72680569 has 4 divisors (see below), whose sum is σ = 78271396. Its totient is φ = 67089744.

The previous prime is 72680557. The next prime is 72680591. The reversal of 72680569 is 96508627.

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 26915344 + 45765225 = 5188^2 + 6765^2 .

It is a cyclic number.

It is not a de Polignac number, because 72680569 - 2⁵ = 72680537 is a prime.

It is a super-2 number, since 2×72680569² = 10564930220327522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72680549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2795394 + ... + 2795419.

It is an arithmetic number, because the mean of its divisors is an integer number (19567849).

Almost surely, 2^72680569 is an apocalyptic number.

It is an amenable number.

72680569 is a deficient number, since it is larger than the sum of its proper divisors (5590827).

72680569 is a wasteful number, since it uses less digits than its factorization.

72680569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5590826.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 72680569 is about 8525.2899657431. The cubic root of 72680569 is about 417.3234344883.

The spelling of 72680569 in words is "seventy-two million, six hundred eighty thousand, five hundred sixty-nine".