23451997 has 2 divisors, whose sum is σ = 23451998. Its totient is φ = 23451996.

The previous prime is 23451971. The next prime is 23452049. The reversal of 23451997 is 79915432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15729156 + 7722841 = 3966^2 + 2779^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23451997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23451937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11725998 + 11725999.

It is an arithmetic number, because the mean of its divisors is an integer number (11725999).

Almost surely, 2^23451997 is an apocalyptic number.

It is an amenable number.

23451997 is a deficient number, since it is larger than the sum of its proper divisors (1).

23451997 is an equidigital number, since it uses as much as digits as its factorization.

23451997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 40.

The square root of 23451997 is about 4842.7261950269. The cubic root of 23451997 is about 286.2375526455.

The spelling of 23451997 in words is "twenty-three million, four hundred fifty-one thousand, nine hundred ninety-seven".