23977389 has 4 divisors (see below), whose sum is σ = 31969856. Its totient is φ = 15984924.

The previous prime is 23977363. The next prime is 23977391. The reversal of 23977389 is 98377932.

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 not a de Polignac number, because 23977389 - 2⁸ = 23977133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23977319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3996229 + ... + 3996234.

It is an arithmetic number, because the mean of its divisors is an integer number (7992464).

Almost surely, 2^23977389 is an apocalyptic number.

It is an amenable number.

23977389 is a deficient number, since it is larger than the sum of its proper divisors (7992467).

23977389 is an equidigital number, since it uses as much as digits as its factorization.

23977389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7992466.

The product of its digits is 571536, while the sum is 48.

The square root of 23977389 is about 4896.6712162448. The cubic root of 23977389 is about 288.3593003073.

The spelling of 23977389 in words is "twenty-three million, nine hundred seventy-seven thousand, three hundred eighty-nine".