57057439 has 2 divisors, whose sum is σ = 57057440. Its totient is φ = 57057438.

The previous prime is 57057433. The next prime is 57057461. The reversal of 57057439 is 93475075.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57057439 - 2⁹ = 57056927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57057433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28528719 + 28528720.

It is an arithmetic number, because the mean of its divisors is an integer number (28528720).

Almost surely, 2^57057439 is an apocalyptic number.

57057439 is a deficient number, since it is larger than the sum of its proper divisors (1).

57057439 is an equidigital number, since it uses as much as digits as its factorization.

57057439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 132300, while the sum is 40.

The square root of 57057439 is about 7553.6374681341. The cubic root of 57057439 is about 384.9793411077.

The spelling of 57057439 in words is "fifty-seven million, fifty-seven thousand, four hundred thirty-nine".