23646989 has 4 divisors (see below), whose sum is σ = 23677824. Its totient is φ = 23616156.

The previous prime is 23646979. The next prime is 23647003. The reversal of 23646989 is 98964632.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23646989 - 2²⁰ = 22598413 is a prime.

It is a super-2 number, since 2×23646989² = 1118360177532242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23646979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14237 + ... + 15810.

It is an arithmetic number, because the mean of its divisors is an integer number (5919456).

Almost surely, 2^23646989 is an apocalyptic number.

It is an amenable number.

23646989 is a deficient number, since it is larger than the sum of its proper divisors (30835).

23646989 is an equidigital number, since it uses as much as digits as its factorization.

23646989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30834.

The product of its digits is 559872, while the sum is 47.

The square root of 23646989 is about 4862.8169819560. The cubic root of 23646989 is about 287.0286729721.

The spelling of 23646989 in words is "twenty-three million, six hundred forty-six thousand, nine hundred eighty-nine".