72995609 has 2 divisors, whose sum is σ = 72995610. Its totient is φ = 72995608.

The previous prime is 72995563. The next prime is 72995617. The reversal of 72995609 is 90659927.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72931600 + 64009 = 8540^2 + 253^2 .

It is a cyclic number.

It is not a de Polignac number, because 72995609 - 2²⁰ = 71947033 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72995009) 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, 36497804 + 36497805.

It is an arithmetic number, because the mean of its divisors is an integer number (36497805).

Almost surely, 2^72995609 is an apocalyptic number.

It is an amenable number.

72995609 is a deficient number, since it is larger than the sum of its proper divisors (1).

72995609 is an equidigital number, since it uses as much as digits as its factorization.

72995609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 306180, while the sum is 47.

The square root of 72995609 is about 8543.7467776146. The cubic root of 72995609 is about 417.9255397996.

The spelling of 72995609 in words is "seventy-two million, nine hundred ninety-five thousand, six hundred nine".