57240637 has 2 divisors, whose sum is σ = 57240638. Its totient is φ = 57240636.

The previous prime is 57240593. The next prime is 57240641. The reversal of 57240637 is 73604275.

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., 56340036 + 900601 = 7506^2 + 949^2 .

It is a cyclic number.

It is not a de Polignac number, because 57240637 - 2¹⁵ = 57207869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57240647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28620318 + 28620319.

It is an arithmetic number, because the mean of its divisors is an integer number (28620319).

Almost surely, 2^57240637 is an apocalyptic number.

It is an amenable number.

57240637 is a deficient number, since it is larger than the sum of its proper divisors (1).

57240637 is an equidigital number, since it uses as much as digits as its factorization.

57240637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35280, while the sum is 34.

The square root of 57240637 is about 7565.7542254556. The cubic root of 57240637 is about 385.3909269212.

It can be divided in two parts, 572 and 40637, that added together give a square (41209 = 203²).

The spelling of 57240637 in words is "fifty-seven million, two hundred forty thousand, six hundred thirty-seven".