57403387 has 2 divisors, whose sum is σ = 57403388. Its totient is φ = 57403386.

The previous prime is 57403363. The next prime is 57403397. The reversal of 57403387 is 78330475.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57403387 is a prime.

It is not a weakly prime, because it can be changed into another prime (57403337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28701693 + 28701694.

It is an arithmetic number, because the mean of its divisors is an integer number (28701694).

Almost surely, 2^57403387 is an apocalyptic number.

57403387 is a deficient number, since it is larger than the sum of its proper divisors (1).

57403387 is an equidigital number, since it uses as much as digits as its factorization.

57403387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 37.

The square root of 57403387 is about 7576.5022932749. The cubic root of 57403387 is about 385.7558368001.

The spelling of 57403387 in words is "fifty-seven million, four hundred three thousand, three hundred eighty-seven".