123498769 has 3 divisors (see below), whose sum is σ = 123509883. Its totient is φ = 123487656.

The previous prime is 123498757. The next prime is 123498811. The reversal of 123498769 is 967894321.

The square root of 123498769 is 11113.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 555025 + 122943744 = 745^2 + 11088^2 .

It is not a de Polignac number, because 123498769 - 2⁹ = 123498257 is a prime.

It is a super-2 number, since 2×123498769² = 30503891889030722, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123498719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 5557 + ... + 16669.

It is an arithmetic number, because the mean of its divisors is an integer number (41169961).

Almost surely, 2^123498769 is an apocalyptic number.

123498769 is the 11113-rd square number.

123498769 is the 5557-th centered octagonal number.

It is an amenable number.

123498769 is a deficient number, since it is larger than the sum of its proper divisors (11114).

123498769 is an frugal number, since it uses more digits than its factorization.

123498769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22226 (or 11113 counting only the distinct ones).

The product of its digits is 653184, while the sum is 49.

The cubic root of 123498769 is about 497.9902916340.

Multiplying 123498769 by its sum of digits (49), we get a square (6051439681 = 77791²).

The spelling of 123498769 in words is "one hundred twenty-three million, four hundred ninety-eight thousand, seven hundred sixty-nine".