74312009 has 2 divisors, whose sum is σ = 74312010. Its totient is φ = 74312008.

The previous prime is 74311999. The next prime is 74312023. The reversal of 74312009 is 90021347.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51079609 + 23232400 = 7147^2 + 4820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74312009 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (74312089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37156004 + 37156005.

It is an arithmetic number, because the mean of its divisors is an integer number (37156005).

Almost surely, 2^74312009 is an apocalyptic number.

It is an amenable number.

74312009 is a deficient number, since it is larger than the sum of its proper divisors (1).

74312009 is an equidigital number, since it uses as much as digits as its factorization.

74312009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 74312009 is about 8620.4413460101. The cubic root of 74312009 is about 420.4228715245.

The spelling of 74312009 in words is "seventy-four million, three hundred twelve thousand, nine".