72590909 has 8 divisors (see below), whose sum is σ = 73256832. Its totient is φ = 71928000.

The previous prime is 72590851. The next prime is 72590911. The reversal of 72590909 is 90909527.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72590909 is a prime.

It is a super-3 number, since 3×72590909³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72590009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96284 + ... + 97034.

It is an arithmetic number, because the mean of its divisors is an integer number (9157104).

Almost surely, 2^72590909 is an apocalyptic number.

It is an amenable number.

72590909 is a deficient number, since it is larger than the sum of its proper divisors (665923).

72590909 is a wasteful number, since it uses less digits than its factorization.

72590909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1507.

The product of its (nonzero) digits is 51030, while the sum is 41.

The square root of 72590909 is about 8520.0298708397. The cubic root of 72590909 is about 417.1517580858.

The spelling of 72590909 in words is "seventy-two million, five hundred ninety thousand, nine hundred nine".