23609645 has 18 divisors (see below), whose sum is σ = 29597694. Its totient is φ = 18079360.

The previous prime is 23609639. The next prime is 23609687. The reversal of 23609645 is 54690632.

It can be written as a sum of positive squares in 9 ways, for example, as 12124324 + 11485321 = 3482^2 + 3389^2 .

It is not a de Polignac number, because 23609645 - 2⁸ = 23609389 is a prime.

It is a super-3 number, since 3×23609645³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 445439 + ... + 445491.

Almost surely, 2^23609645 is an apocalyptic number.

It is an amenable number.

23609645 is a deficient number, since it is larger than the sum of its proper divisors (5988049).

23609645 is an frugal number, since it uses more digits than its factorization.

23609645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 23609645 is about 4858.9757151070. The cubic root of 23609645 is about 286.8774987402.

The spelling of 23609645 in words is "twenty-three million, six hundred nine thousand, six hundred forty-five".