23400397 has 2 divisors, whose sum is σ = 23400398. Its totient is φ = 23400396.

The previous prime is 23400389. The next prime is 23400413. The reversal of 23400397 is 79300432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18498601 + 4901796 = 4301^2 + 2214^2 .

It is a cyclic number.

It is not a de Polignac number, because 23400397 - 2³ = 23400389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23400337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11700198 + 11700199.

It is an arithmetic number, because the mean of its divisors is an integer number (11700199).

Almost surely, 2^23400397 is an apocalyptic number.

It is an amenable number.

23400397 is a deficient number, since it is larger than the sum of its proper divisors (1).

23400397 is an equidigital number, since it uses as much as digits as its factorization.

23400397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 23400397 is about 4837.3956836298. The cubic root of 23400397 is about 286.0274681428.

The spelling of 23400397 in words is "twenty-three million, four hundred thousand, three hundred ninety-seven".