23437989 has 12 divisors (see below), whose sum is σ = 35327136. Its totient is φ = 14945832.

The previous prime is 23437987. The next prime is 23438027. The reversal of 23437989 is 98973432.

It is a happy number.

It is not a de Polignac number, because 23437989 - 2¹ = 23437987 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23437987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56407 + ... + 56820.

It is an arithmetic number, because the mean of its divisors is an integer number (2943928).

Almost surely, 2^23437989 is an apocalyptic number.

It is an amenable number.

23437989 is a deficient number, since it is larger than the sum of its proper divisors (11889147).

23437989 is a wasteful number, since it uses less digits than its factorization.

23437989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113256 (or 113253 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 23437989 is about 4841.2796861987. The cubic root of 23437989 is about 286.1805509010.

The spelling of 23437989 in words is "twenty-three million, four hundred thirty-seven thousand, nine hundred eighty-nine".