74908909 has 2 divisors, whose sum is σ = 74908910. Its totient is φ = 74908908.

The previous prime is 74908903. The next prime is 74908931. The reversal of 74908909 is 90980947.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74338884 + 570025 = 8622^2 + 755^2 .

It is an emirp because it is prime and its reverse (90980947) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74908909 - 2⁷ = 74908781 is a prime.

It is a super-2 number, since 2×74908909² = 11222689295140562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74908903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37454454 + 37454455.

It is an arithmetic number, because the mean of its divisors is an integer number (37454455).

Almost surely, 2^74908909 is an apocalyptic number.

It is an amenable number.

74908909 is a deficient number, since it is larger than the sum of its proper divisors (1).

74908909 is an equidigital number, since it uses as much as digits as its factorization.

74908909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 74908909 is about 8654.9932986687. The cubic root of 74908909 is about 421.5455320951.

The spelling of 74908909 in words is "seventy-four million, nine hundred eight thousand, nine hundred nine".