23031397 has 2 divisors, whose sum is σ = 23031398. Its totient is φ = 23031396.

The previous prime is 23031383. The next prime is 23031403. The reversal of 23031397 is 79313032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12068676 + 10962721 = 3474^2 + 3311^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23031397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23031367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11515698 + 11515699.

It is an arithmetic number, because the mean of its divisors is an integer number (11515699).

Almost surely, 2^23031397 is an apocalyptic number.

It is an amenable number.

23031397 is a deficient number, since it is larger than the sum of its proper divisors (1).

23031397 is an equidigital number, since it uses as much as digits as its factorization.

23031397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3402, while the sum is 28.

The square root of 23031397 is about 4799.1037704972. The cubic root of 23031397 is about 284.5160433378.

The spelling of 23031397 in words is "twenty-three million, thirty-one thousand, three hundred ninety-seven".