74339809 has 2 divisors, whose sum is σ = 74339810. Its totient is φ = 74339808.

The previous prime is 74339801. The next prime is 74339851. The reversal of 74339809 is 90893347.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64448784 + 9891025 = 8028^2 + 3145^2 .

It is a cyclic number.

It is not a de Polignac number, because 74339809 - 2³ = 74339801 is a prime.

It is not a weakly prime, because it can be changed into another prime (74339801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37169904 + 37169905.

It is an arithmetic number, because the mean of its divisors is an integer number (37169905).

Almost surely, 2^74339809 is an apocalyptic number.

It is an amenable number.

74339809 is a deficient number, since it is larger than the sum of its proper divisors (1).

74339809 is an equidigital number, since it uses as much as digits as its factorization.

74339809 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 43.

The square root of 74339809 is about 8622.0536416796. The cubic root of 74339809 is about 420.4752914892.

The spelling of 74339809 in words is "seventy-four million, three hundred thirty-nine thousand, eight hundred nine".