74507857 has 2 divisors, whose sum is σ = 74507858. Its totient is φ = 74507856.

The previous prime is 74507809. The next prime is 74507891. The reversal of 74507857 is 75870547.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64496961 + 10010896 = 8031^2 + 3164^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74507857 is a prime.

It is not a weakly prime, because it can be changed into another prime (74517857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37253928 + 37253929.

It is an arithmetic number, because the mean of its divisors is an integer number (37253929).

Almost surely, 2^74507857 is an apocalyptic number.

It is an amenable number.

74507857 is a deficient number, since it is larger than the sum of its proper divisors (1).

74507857 is an equidigital number, since it uses as much as digits as its factorization.

74507857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 274400, while the sum is 43.

The square root of 74507857 is about 8631.7933826060. The cubic root of 74507857 is about 420.7918865781.

The spelling of 74507857 in words is "seventy-four million, five hundred seven thousand, eight hundred fifty-seven".