74393009 has 2 divisors, whose sum is σ = 74393010. Its totient is φ = 74393008.

The previous prime is 74392987. The next prime is 74393021. The reversal of 74393009 is 90039347.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61230625 + 13162384 = 7825^2 + 3628^2 .

It is a cyclic number.

It is not a de Polignac number, because 74393009 - 2⁸ = 74392753 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74393009.

It is not a weakly prime, because it can be changed into another prime (74393029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37196504 + 37196505.

It is an arithmetic number, because the mean of its divisors is an integer number (37196505).

Almost surely, 2^74393009 is an apocalyptic number.

It is an amenable number.

74393009 is a deficient number, since it is larger than the sum of its proper divisors (1).

74393009 is an equidigital number, since it uses as much as digits as its factorization.

74393009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 74393009 is about 8625.1382017913. The cubic root of 74393009 is about 420.5755695317.

The spelling of 74393009 in words is "seventy-four million, three hundred ninety-three thousand, nine".