74681857 has 2 divisors, whose sum is σ = 74681858. Its totient is φ = 74681856.

The previous prime is 74681807. The next prime is 74681879. The reversal of 74681857 is 75818647.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57699216 + 16982641 = 7596^2 + 4121^2 .

It is a cyclic number.

It is not a de Polignac number, because 74681857 - 2⁷ = 74681729 is a prime.

It is not a weakly prime, because it can be changed into another prime (74681807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37340928 + 37340929.

It is an arithmetic number, because the mean of its divisors is an integer number (37340929).

Almost surely, 2^74681857 is an apocalyptic number.

It is an amenable number.

74681857 is a deficient number, since it is larger than the sum of its proper divisors (1).

74681857 is an equidigital number, since it uses as much as digits as its factorization.

74681857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 376320, while the sum is 46.

The square root of 74681857 is about 8641.8665229220. The cubic root of 74681857 is about 421.1191937431.

It can be divided in two parts, 7 and 4681857, that added together give a palindrome (4681864).

The spelling of 74681857 in words is "seventy-four million, six hundred eighty-one thousand, eight hundred fifty-seven".