72890863 has 4 divisors (see below), whose sum is σ = 72987408. Its totient is φ = 72794320.

The previous prime is 72890837. The next prime is 72890879. The reversal of 72890863 is 36809827.

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

It is a cyclic number.

It is not a de Polignac number, because 72890863 - 2²⁵ = 39336431 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 (72890803) 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, 47131 + ... + 48652.

It is an arithmetic number, because the mean of its divisors is an integer number (18246852).

Almost surely, 2^72890863 is an apocalyptic number.

72890863 is a deficient number, since it is larger than the sum of its proper divisors (96545).

72890863 is an equidigital number, since it uses as much as digits as its factorization.

72890863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96544.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 72890863 is about 8537.6145965955. The cubic root of 72890863 is about 417.7255415399.

The spelling of 72890863 in words is "seventy-two million, eight hundred ninety thousand, eight hundred sixty-three".