72791945 has 8 divisors (see below), whose sum is σ = 91947840. Its totient is φ = 55168560.

The previous prime is 72791903. The next prime is 72791947. The reversal of 72791945 is 54919727.

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

It is not a de Polignac number, because 72791945 - 2¹⁴ = 72775561 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 72791896 and 72791905.

It is not an unprimeable number, because it can be changed into a prime (72791947) 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, 383021 + ... + 383210.

It is an arithmetic number, because the mean of its divisors is an integer number (11493480).

Almost surely, 2^72791945 is an apocalyptic number.

It is an amenable number.

72791945 is a deficient number, since it is larger than the sum of its proper divisors (19155895).

72791945 is a wasteful number, since it uses less digits than its factorization.

72791945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766255.

The product of its digits is 158760, while the sum is 44.

The square root of 72791945 is about 8531.8195597422. The cubic root of 72791945 is about 417.5364950707.

The spelling of 72791945 in words is "seventy-two million, seven hundred ninety-one thousand, nine hundred forty-five".