74115809 has 2 divisors, whose sum is σ = 74115810. Its totient is φ = 74115808.

The previous prime is 74115799. The next prime is 74115841. The reversal of 74115809 is 90851147.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55651600 + 18464209 = 7460^2 + 4297^2 .

It is a cyclic number.

It is not a de Polignac number, because 74115809 - 2⁸ = 74115553 is a prime.

It is not a weakly prime, because it can be changed into another prime (74115109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37057904 + 37057905.

It is an arithmetic number, because the mean of its divisors is an integer number (37057905).

Almost surely, 2^74115809 is an apocalyptic number.

It is an amenable number.

74115809 is a deficient number, since it is larger than the sum of its proper divisors (1).

74115809 is an equidigital number, since it uses as much as digits as its factorization.

74115809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 74115809 is about 8609.0538969157. The cubic root of 74115809 is about 420.0525425573.

The spelling of 74115809 in words is "seventy-four million, one hundred fifteen thousand, eight hundred nine".