57402437 has 2 divisors, whose sum is σ = 57402438. Its totient is φ = 57402436.

The previous prime is 57402391. The next prime is 57402469. The reversal of 57402437 is 73420475.

It is an a-pointer prime, because the next prime (57402469) can be obtained adding 57402437 to its sum of digits (32).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54626881 + 2775556 = 7391^2 + 1666^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57402437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57402937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28701218 + 28701219.

It is an arithmetic number, because the mean of its divisors is an integer number (28701219).

Almost surely, 2^57402437 is an apocalyptic number.

It is an amenable number.

57402437 is a deficient number, since it is larger than the sum of its proper divisors (1).

57402437 is an equidigital number, since it uses as much as digits as its factorization.

57402437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23520, while the sum is 32.

The square root of 57402437 is about 7576.4395991785. The cubic root of 57402437 is about 385.7537087604.

The spelling of 57402437 in words is "fifty-seven million, four hundred two thousand, four hundred thirty-seven".