72890653 has 4 divisors (see below), whose sum is σ = 79517088. Its totient is φ = 66264220.

The previous prime is 72890639. The next prime is 72890687. The reversal of 72890653 is 35609827.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35609827 = 11 ⋅3237257.

It is not a de Polignac number, because 72890653 - 2⁵ = 72890621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72890603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3313201 + ... + 3313222.

It is an arithmetic number, because the mean of its divisors is an integer number (19879272).

Almost surely, 2^72890653 is an apocalyptic number.

It is an amenable number.

72890653 is a deficient number, since it is larger than the sum of its proper divisors (6626435).

72890653 is a wasteful number, since it uses less digits than its factorization.

72890653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6626434.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 72890653 is about 8537.6022980694. The cubic root of 72890653 is about 417.7251403810.

The spelling of 72890653 in words is "seventy-two million, eight hundred ninety thousand, six hundred fifty-three".