123121493 has 8 divisors (see below), whose sum is σ = 135425856. Its totient is φ = 111927420.

The previous prime is 123121477. The next prime is 123121511. The reversal of 123121493 is 394121321.

It is not a de Polignac number, because 123121493 - 2⁴ = 123121477 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123121403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44921 + ... + 47582.

It is an arithmetic number, because the mean of its divisors is an integer number (16928232).

Almost surely, 2^123121493 is an apocalyptic number.

It is an amenable number.

123121493 is a deficient number, since it is larger than the sum of its proper divisors (12304363).

123121493 is an frugal number, since it uses more digits than its factorization.

123121493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92536 (or 92514 counting only the distinct ones).

The product of its digits is 1296, while the sum is 26.

The square root of 123121493 is about 11096.0124819685. The cubic root of 123121493 is about 497.4826713828.

The spelling of 123121493 in words is "one hundred twenty-three million, one hundred twenty-one thousand, four hundred ninety-three".