74918009 has 2 divisors, whose sum is σ = 74918010. Its totient is φ = 74918008.

The previous prime is 74918003. The next prime is 74918017. The reversal of 74918009 is 90081947.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50197225 + 24720784 = 7085^2 + 4972^2 .

It is a cyclic number.

It is not a de Polignac number, because 74918009 - 2⁸ = 74917753 is a prime.

It is a super-2 number, since 2×74918009² = 11225416145048162, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (74918003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37459004 + 37459005.

It is an arithmetic number, because the mean of its divisors is an integer number (37459005).

Almost surely, 2^74918009 is an apocalyptic number.

It is an amenable number.

74918009 is a deficient number, since it is larger than the sum of its proper divisors (1).

74918009 is an equidigital number, since it uses as much as digits as its factorization.

74918009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 74918009 is about 8655.5189907943. The cubic root of 74918009 is about 421.5626013110.

The spelling of 74918009 in words is "seventy-four million, nine hundred eighteen thousand, nine".