23637973 has 4 divisors (see below), whose sum is σ = 25028460. Its totient is φ = 22247488.

The previous prime is 23637961. The next prime is 23637983. The reversal of 23637973 is 37973632.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17497489 + 6140484 = 4183^2 + 2478^2 .

It is a cyclic number.

It is not a de Polignac number, because 23637973 - 2⁵ = 23637941 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23637983) 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, 695218 + ... + 695251.

It is an arithmetic number, because the mean of its divisors is an integer number (6257115).

Almost surely, 2^23637973 is an apocalyptic number.

It is an amenable number.

23637973 is a deficient number, since it is larger than the sum of its proper divisors (1390487).

23637973 is a wasteful number, since it uses less digits than its factorization.

23637973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390486.

The product of its digits is 142884, while the sum is 40.

The square root of 23637973 is about 4861.8898588923. The cubic root of 23637973 is about 286.9921894057.

The spelling of 23637973 in words is "twenty-three million, six hundred thirty-seven thousand, nine hundred seventy-three".