23907987 has 12 divisors (see below), whose sum is σ = 35456920. Its totient is φ = 15921720.

The previous prime is 23907979. The next prime is 23907991. The reversal of 23907987 is 78970932.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 23907987 - 2³ = 23907979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23907907) 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, 24937 + ... + 25877.

Almost surely, 2^23907987 is an apocalyptic number.

23907987 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

23907987 is a deficient number, since it is larger than the sum of its proper divisors (11548933).

23907987 is an frugal number, since it uses more digits than its factorization.

23907987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1891 (or 944 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 23907987 is about 4889.5794297669. The cubic root of 23907987 is about 288.0808149942.

Multiplying 23907987 by its product of nonzero digits (190512), we get a square (4554758419344 = 2134188²).

The spelling of 23907987 in words is "twenty-three million, nine hundred seven thousand, nine hundred eighty-seven".