252689737 has 2 divisors, whose sum is σ = 252689738. Its totient is φ = 252689736.

The previous prime is 252689729. The next prime is 252689771. The reversal of 252689737 is 737986252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 247779081 + 4910656 = 15741^2 + 2216^2 .

It is a cyclic number.

It is not a de Polignac number, because 252689737 - 2³ = 252689729 is a prime.

It is not a weakly prime, because it can be changed into another prime (252683737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126344868 + 126344869.

It is an arithmetic number, because the mean of its divisors is an integer number (126344869).

Almost surely, 2^252689737 is an apocalyptic number.

It is an amenable number.

252689737 is a deficient number, since it is larger than the sum of its proper divisors (1).

252689737 is an equidigital number, since it uses as much as digits as its factorization.

252689737 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1270080, while the sum is 49.

The square root of 252689737 is about 15896.2176947851. The cubic root of 252689737 is about 632.2117082024.

The spelling of 252689737 in words is "two hundred fifty-two million, six hundred eighty-nine thousand, seven hundred thirty-seven".