23661172 has 6 divisors (see below), whose sum is σ = 41407058. Its totient is φ = 11830584.

The previous prime is 23661149. The next prime is 23661173. The reversal of 23661172 is 27116632.

It can be written as a sum of positive squares in only one way, i.e., 23561316 + 99856 = 4854^2 + 316^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 23661172.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23661173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2957643 + ... + 2957650.

Almost surely, 2^23661172 is an apocalyptic number.

It is an amenable number.

23661172 is a deficient number, since it is larger than the sum of its proper divisors (17745886).

23661172 is a wasteful number, since it uses less digits than its factorization.

23661172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5915297 (or 5915295 counting only the distinct ones).

The product of its digits is 3024, while the sum is 28.

The square root of 23661172 is about 4864.2750744587. The cubic root of 23661172 is about 287.0860462252.

The spelling of 23661172 in words is "twenty-three million, six hundred sixty-one thousand, one hundred seventy-two".