23456529 has 6 divisors (see below), whose sum is σ = 33881666. Its totient is φ = 15637680.

The previous prime is 23456509. The next prime is 23456539. The reversal of 23456529 is 92565432.

It can be written as a sum of positive squares in only one way, i.e., 20684304 + 2772225 = 4548^2 + 1665^2 .

It is not a de Polignac number, because 23456529 - 2¹⁹ = 22932241 is a prime.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23456493 and 23456502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23456509) 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 5 ways as a sum of consecutive naturals, for example, 1303132 + ... + 1303149.

Almost surely, 2^23456529 is an apocalyptic number.

It is an amenable number.

23456529 is a deficient number, since it is larger than the sum of its proper divisors (10425137).

23456529 is a wasteful number, since it uses less digits than its factorization.

23456529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2606287 (or 2606284 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 23456529 is about 4843.1940906802. The cubic root of 23456529 is about 286.2559895265.

The spelling of 23456529 in words is "twenty-three million, four hundred fifty-six thousand, five hundred twenty-nine".