74911913 has 2 divisors, whose sum is σ = 74911914. Its totient is φ = 74911912.

The previous prime is 74911909. The next prime is 74911931. The reversal of 74911913 is 31911947.

It is a happy number.

Together with next prime (74911931) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69089344 + 5822569 = 8312^2 + 2413^2 .

It is a cyclic number.

It is not a de Polignac number, because 74911913 - 2² = 74911909 is a prime.

It is a super-2 number, since 2×74911913² = 11223589418639138, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (74911933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37455956 + 37455957.

It is an arithmetic number, because the mean of its divisors is an integer number (37455957).

Almost surely, 2^74911913 is an apocalyptic number.

It is an amenable number.

74911913 is a deficient number, since it is larger than the sum of its proper divisors (1).

74911913 is an equidigital number, since it uses as much as digits as its factorization.

74911913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 35.

The square root of 74911913 is about 8655.1668383689. The cubic root of 74911913 is about 421.5511669649.

The spelling of 74911913 in words is "seventy-four million, nine hundred eleven thousand, nine hundred thirteen".