23513977 has 4 divisors (see below), whose sum is σ = 23645520. Its totient is φ = 23382436.

The previous prime is 23513969. The next prime is 23513989. The reversal of 23513977 is 77931532.

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 23513977 - 2³ = 23513969 is a prime.

It is a super-2 number, since 2×23513977² = 1105814228713058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23543977) 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, 65503 + ... + 65860.

It is an arithmetic number, because the mean of its divisors is an integer number (5911380).

Almost surely, 2^23513977 is an apocalyptic number.

It is an amenable number.

23513977 is a deficient number, since it is larger than the sum of its proper divisors (131543).

23513977 is a wasteful number, since it uses less digits than its factorization.

23513977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131542.

The product of its digits is 39690, while the sum is 37.

The square root of 23513977 is about 4849.1212605997. The cubic root of 23513977 is about 286.4894913540.

It can be divided in two parts, 2351 and 3977, that added together give a triangular number (6328 = T₁₁₂).

The spelling of 23513977 in words is "twenty-three million, five hundred thirteen thousand, nine hundred seventy-seven".