23997771 has 12 divisors (see below), whose sum is σ = 39615472. Its totient is φ = 13712976.

The previous prime is 23997769. The next prime is 23997773. The reversal of 23997771 is 17779932.

It is an interprime number because it is at equal distance from previous prime (23997769) and next prime (23997773).

It is not a de Polignac number, because 23997771 - 2¹ = 23997769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23997773) 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, 190396 + ... + 190521.

Almost surely, 2^23997771 is an apocalyptic number.

23997771 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

23997771 is a deficient number, since it is larger than the sum of its proper divisors (15617701).

23997771 is a wasteful number, since it uses less digits than its factorization.

23997771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380930 (or 380927 counting only the distinct ones).

The product of its digits is 166698, while the sum is 45.

The square root of 23997771 is about 4898.7519839241. The cubic root of 23997771 is about 288.4409838564.

The spelling of 23997771 in words is "twenty-three million, nine hundred ninety-seven thousand, seven hundred seventy-one".