74888257 has 2 divisors, whose sum is σ = 74888258. Its totient is φ = 74888256.

The previous prime is 74888251. The next prime is 74888273. The reversal of 74888257 is 75288847.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47941776 + 26946481 = 6924^2 + 5191^2 .

It is a cyclic number.

It is not a de Polignac number, because 74888257 - 2²³ = 66499649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74888257.

It is not a weakly prime, because it can be changed into another prime (74888251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37444128 + 37444129.

It is an arithmetic number, because the mean of its divisors is an integer number (37444129).

Almost surely, 2^74888257 is an apocalyptic number.

It is an amenable number.

74888257 is a deficient number, since it is larger than the sum of its proper divisors (1).

74888257 is an equidigital number, since it uses as much as digits as its factorization.

74888257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1003520, while the sum is 49.

The square root of 74888257 is about 8653.8001479119. The cubic root of 74888257 is about 421.5067892245.

The spelling of 74888257 in words is "seventy-four million, eight hundred eighty-eight thousand, two hundred fifty-seven".