72791013 has 4 divisors (see below), whose sum is σ = 97054688. Its totient is φ = 48527340.

The previous prime is 72790999. The next prime is 72791039. The reversal of 72791013 is 31019727.

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.

It is not a de Polignac number, because 72791013 - 2⁴ = 72790997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72793013) 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, 12131833 + ... + 12131838.

It is an arithmetic number, because the mean of its divisors is an integer number (24263672).

Almost surely, 2^72791013 is an apocalyptic number.

It is an amenable number.

72791013 is a deficient number, since it is larger than the sum of its proper divisors (24263675).

72791013 is a wasteful number, since it uses less digits than its factorization.

72791013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24263674.

The product of its (nonzero) digits is 2646, while the sum is 30.

The square root of 72791013 is about 8531.7649405032. The cubic root of 72791013 is about 417.5347130710.

The spelling of 72791013 in words is "seventy-two million, seven hundred ninety-one thousand, thirteen".