74131913 has 2 divisors, whose sum is σ = 74131914. Its totient is φ = 74131912.

The previous prime is 74131909. The next prime is 74131919. The reversal of 74131913 is 31913147.

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., 58553104 + 15578809 = 7652^2 + 3947^2 .

It is a cyclic number.

It is not a de Polignac number, because 74131913 - 2² = 74131909 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (74131919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37065956 + 37065957.

It is an arithmetic number, because the mean of its divisors is an integer number (37065957).

Almost surely, 2^74131913 is an apocalyptic number.

It is an amenable number.

74131913 is a deficient number, since it is larger than the sum of its proper divisors (1).

74131913 is an equidigital number, since it uses as much as digits as its factorization.

74131913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268, while the sum is 29.

The square root of 74131913 is about 8609.9891405274. The cubic root of 74131913 is about 420.0829635807.

The spelling of 74131913 in words is "seventy-four million, one hundred thirty-one thousand, nine hundred thirteen".