23187457 has 2 divisors, whose sum is σ = 23187458. Its totient is φ = 23187456.

The previous prime is 23187433. The next prime is 23187469. The reversal of 23187457 is 75478132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15397776 + 7789681 = 3924^2 + 2791^2 .

It is a cyclic number.

It is not a de Polignac number, because 23187457 - 2¹⁵ = 23154689 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23187407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11593728 + 11593729.

It is an arithmetic number, because the mean of its divisors is an integer number (11593729).

Almost surely, 2^23187457 is an apocalyptic number.

It is an amenable number.

23187457 is a deficient number, since it is larger than the sum of its proper divisors (1).

23187457 is an equidigital number, since it uses as much as digits as its factorization.

23187457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47040, while the sum is 37.

The square root of 23187457 is about 4815.3356061650. The cubic root of 23187457 is about 285.1572211421.

The spelling of 23187457 in words is "twenty-three million, one hundred eighty-seven thousand, four hundred fifty-seven".