74891413 has 2 divisors, whose sum is σ = 74891414. Its totient is φ = 74891412.

The previous prime is 74891363. The next prime is 74891419. The reversal of 74891413 is 31419847.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56896849 + 17994564 = 7543^2 + 4242^2 .

It is a cyclic number.

It is not a de Polignac number, because 74891413 - 2⁹ = 74890901 is a prime.

It is a super-2 number, since 2×74891413² = 11217447482273138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74891419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37445706 + 37445707.

It is an arithmetic number, because the mean of its divisors is an integer number (37445707).

Almost surely, 2^74891413 is an apocalyptic number.

It is an amenable number.

74891413 is a deficient number, since it is larger than the sum of its proper divisors (1).

74891413 is an equidigital number, since it uses as much as digits as its factorization.

74891413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 37.

The square root of 74891413 is about 8653.9824936269. The cubic root of 74891413 is about 421.5127102986.

The spelling of 74891413 in words is "seventy-four million, eight hundred ninety-one thousand, four hundred thirteen".