74615609 has 2 divisors, whose sum is σ = 74615610. Its totient is φ = 74615608.

The previous prime is 74615599. The next prime is 74615659. The reversal of 74615609 is 90651647.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57805609 + 16810000 = 7603^2 + 4100^2 .

It is an emirp because it is prime and its reverse (90651647) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74615609 - 2²⁰ = 73567033 is a prime.

It is not a weakly prime, because it can be changed into another prime (74615659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37307804 + 37307805.

It is an arithmetic number, because the mean of its divisors is an integer number (37307805).

Almost surely, 2^74615609 is an apocalyptic number.

It is an amenable number.

74615609 is a deficient number, since it is larger than the sum of its proper divisors (1).

74615609 is an equidigital number, since it uses as much as digits as its factorization.

74615609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 74615609 is about 8638.0327042678. The cubic root of 74615609 is about 420.9946362367.

The spelling of 74615609 in words is "seventy-four million, six hundred fifteen thousand, six hundred nine".