72396565 has 4 divisors (see below), whose sum is σ = 86875884. Its totient is φ = 57917248.

The previous prime is 72396553. The next prime is 72396581. The reversal of 72396565 is 56569327.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41460721 + 30935844 = 6439^2 + 5562^2 .

It is a cyclic number.

It is not a de Polignac number, because 72396565 - 2⁷ = 72396437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7239652 + ... + 7239661.

It is an arithmetic number, because the mean of its divisors is an integer number (21718971).

Almost surely, 2^72396565 is an apocalyptic number.

It is an amenable number.

72396565 is a deficient number, since it is larger than the sum of its proper divisors (14479319).

72396565 is a wasteful number, since it uses less digits than its factorization.

72396565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14479318.

The product of its digits is 340200, while the sum is 43.

The square root of 72396565 is about 8508.6171026789. The cubic root of 72396565 is about 416.7791522079.

The spelling of 72396565 in words is "seventy-two million, three hundred ninety-six thousand, five hundred sixty-five".