252679709 has 2 divisors, whose sum is σ = 252679710. Its totient is φ = 252679708.

The previous prime is 252679657. The next prime is 252679717. The reversal of 252679709 is 907976252.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141967225 + 110712484 = 11915^2 + 10522^2 .

It is a cyclic number.

It is not a de Polignac number, because 252679709 - 2¹² = 252675613 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252679759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126339854 + 126339855.

It is an arithmetic number, because the mean of its divisors is an integer number (126339855).

Almost surely, 2^252679709 is an apocalyptic number.

It is an amenable number.

252679709 is a deficient number, since it is larger than the sum of its proper divisors (1).

252679709 is an equidigital number, since it uses as much as digits as its factorization.

252679709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 476280, while the sum is 47.

The square root of 252679709 is about 15895.9022707112. The cubic root of 252679709 is about 632.2033449781.

The spelling of 252679709 in words is "two hundred fifty-two million, six hundred seventy-nine thousand, seven hundred nine".