23659669489 has 3 divisors (see below), whose sum is σ = 23659823307. Its totient is φ = 23659515672.

The previous prime is 23659669457. The next prime is 23659669531. The reversal of 23659669489 is 98496695632.

It is a happy number.

The square root of 23659669489 is 153817.

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., 3151138225 + 20508531264 = 56135^2 + 143208^2 .

It is not a de Polignac number, because 23659669489 - 2⁵ = 23659669457 is a prime.

It is a super-2 number, since 2×23659669489² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23659669289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 76909 + ... + 230725.

It is an arithmetic number, because the mean of its divisors is an integer number (7886607769).

Almost surely, 2^23659669489 is an apocalyptic number.

23659669489 is the 153817-th square number.

23659669489 is the 76909-th centered octagonal number.

It is an amenable number.

23659669489 is a deficient number, since it is larger than the sum of its proper divisors (153818).

23659669489 is an frugal number, since it uses more digits than its factorization.

23659669489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307634 (or 153817 counting only the distinct ones).

The product of its digits is 151165440, while the sum is 67.

The spelling of 23659669489 in words is "twenty-three billion, six hundred fifty-nine million, six hundred sixty-nine thousand, four hundred eighty-nine".