252557693 has 2 divisors, whose sum is σ = 252557694. Its totient is φ = 252557692.

The previous prime is 252557681. The next prime is 252557699. The reversal of 252557693 is 396755252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 218241529 + 34316164 = 14773^2 + 5858^2 .

It is a cyclic number.

It is not a de Polignac number, because 252557693 - 2¹⁶ = 252492157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252557699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126278846 + 126278847.

It is an arithmetic number, because the mean of its divisors is an integer number (126278847).

Almost surely, 2^252557693 is an apocalyptic number.

It is an amenable number.

252557693 is a deficient number, since it is larger than the sum of its proper divisors (1).

252557693 is an equidigital number, since it uses as much as digits as its factorization.

252557693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 567000, while the sum is 44.

The square root of 252557693 is about 15892.0638370226. The cubic root of 252557693 is about 632.1015674571.

The spelling of 252557693 in words is "two hundred fifty-two million, five hundred fifty-seven thousand, six hundred ninety-three".