72530891 has 16 divisors (see below), whose sum is σ = 81476928. Its totient is φ = 64204800.

The previous prime is 72530879. The next prime is 72530897. The reversal of 72530891 is 19803527.

It is a cyclic number.

It is not a de Polignac number, because 72530891 - 2¹⁰ = 72529867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72530897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22331 + ... + 25371.

It is an arithmetic number, because the mean of its divisors is an integer number (5092308).

Almost surely, 2^72530891 is an apocalyptic number.

72530891 is a deficient number, since it is larger than the sum of its proper divisors (8946037).

72530891 is a wasteful number, since it uses less digits than its factorization.

72530891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3142.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 72530891 is about 8516.5069717578. The cubic root of 72530891 is about 417.0367596752.

The spelling of 72530891 in words is "seventy-two million, five hundred thirty thousand, eight hundred ninety-one".