23971997 has 16 divisors (see below), whose sum is σ = 28200960. Its totient is φ = 19953648.

The previous prime is 23971993. The next prime is 23972017. The reversal of 23971997 is 79917932.

It is a cyclic number.

It is not a de Polignac number, because 23971997 - 2² = 23971993 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 (23971991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36728 + ... + 37374.

It is an arithmetic number, because the mean of its divisors is an integer number (1762560).

Almost surely, 2^23971997 is an apocalyptic number.

It is an amenable number.

23971997 is a deficient number, since it is larger than the sum of its proper divisors (4228963).

23971997 is an equidigital number, since it uses as much as digits as its factorization.

23971997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800.

The product of its digits is 214326, while the sum is 47.

The square root of 23971997 is about 4896.1206071746. The cubic root of 23971997 is about 288.3376834149.

The spelling of 23971997 in words is "twenty-three million, nine hundred seventy-one thousand, nine hundred ninety-seven".