57420079 has 2 divisors, whose sum is σ = 57420080. Its totient is φ = 57420078.

The previous prime is 57420073. The next prime is 57420107. The reversal of 57420079 is 97002475.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57420079 - 2⁷ = 57419951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57420073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28710039 + 28710040.

It is an arithmetic number, because the mean of its divisors is an integer number (28710040).

Almost surely, 2^57420079 is an apocalyptic number.

57420079 is a deficient number, since it is larger than the sum of its proper divisors (1).

57420079 is an equidigital number, since it uses as much as digits as its factorization.

57420079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 57420079 is about 7577.6037769205. The cubic root of 57420079 is about 385.7932237485.

The spelling of 57420079 in words is "fifty-seven million, four hundred twenty thousand, seventy-nine".