23936991 has 24 divisors (see below), whose sum is σ = 35698176. Its totient is φ = 14245920.

The previous prime is 23936971. The next prime is 23936993. The reversal of 23936991 is 19963932.

It is a happy number.

It is not a de Polignac number, because 23936991 - 2¹⁴ = 23920607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23936993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14956 + ... + 16478.

It is an arithmetic number, because the mean of its divisors is an integer number (1487424).

Almost surely, 2^23936991 is an apocalyptic number.

23936991 is a deficient number, since it is larger than the sum of its proper divisors (11761185).

23936991 is a wasteful number, since it uses less digits than its factorization.

23936991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1583 (or 1570 counting only the distinct ones).

The product of its digits is 78732, while the sum is 42.

The square root of 23936991 is about 4892.5444300486. The cubic root of 23936991 is about 288.1972631001.

The spelling of 23936991 in words is "twenty-three million, nine hundred thirty-six thousand, nine hundred ninety-one".