74899534393 has 2 divisors, whose sum is σ = 74899534394. Its totient is φ = 74899534392.

The previous prime is 74899534331. The next prime is 74899534511. The reversal of 74899534393 is 39343599847.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73458345024 + 1441189369 = 271032^2 + 37963^2 .

It is a cyclic number.

It is not a de Polignac number, because 74899534393 - 2³³ = 66309599801 is a prime.

It is not a weakly prime, because it can be changed into another prime (74899534313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37449767196 + 37449767197.

It is an arithmetic number, because the mean of its divisors is an integer number (37449767197).

Almost surely, 2^74899534393 is an apocalyptic number.

It is an amenable number.

74899534393 is a deficient number, since it is larger than the sum of its proper divisors (1).

74899534393 is an equidigital number, since it uses as much as digits as its factorization.

74899534393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 88179840, while the sum is 64.

The spelling of 74899534393 in words is "seventy-four billion, eight hundred ninety-nine million, five hundred thirty-four thousand, three hundred ninety-three".