23161637 has 4 divisors (see below), whose sum is σ = 23179296. Its totient is φ = 23143980.

The previous prime is 23161613. The next prime is 23161643. The reversal of 23161637 is 73616132.

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 23161637 - 2⁸ = 23161381 is a prime.

It is a super-2 number, since 2×23161637² = 1072922857039538, 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 (23161657) 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, 6689 + ... + 9542.

It is an arithmetic number, because the mean of its divisors is an integer number (5794824).

Almost surely, 2^23161637 is an apocalyptic number.

It is an amenable number.

23161637 is a deficient number, since it is larger than the sum of its proper divisors (17659).

23161637 is a wasteful number, since it uses less digits than its factorization.

23161637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17658.

The product of its digits is 4536, while the sum is 29.

The square root of 23161637 is about 4812.6538416969. The cubic root of 23161637 is about 285.0513378330.

Adding to 23161637 its reverse (73616132), we get a palindrome (96777769).

The spelling of 23161637 in words is "twenty-three million, one hundred sixty-one thousand, six hundred thirty-seven".