72560991 has 8 divisors (see below), whose sum is σ = 96840880. Its totient is φ = 48327552.

The previous prime is 72560989. The next prime is 72561011. The reversal of 72560991 is 19906527.

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

It is not a de Polignac number, because 72560991 - 2¹ = 72560989 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 (72560941) 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, 7786 + ... + 14343.

It is an arithmetic number, because the mean of its divisors is an integer number (12105110).

Almost surely, 2^72560991 is an apocalyptic number.

72560991 is a deficient number, since it is larger than the sum of its proper divisors (24279889).

72560991 is a wasteful number, since it uses less digits than its factorization.

72560991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23225.

The product of its (nonzero) digits is 34020, while the sum is 39.

The square root of 72560991 is about 8518.2739448787. The cubic root of 72560991 is about 417.0944411690.

It can be divided in two parts, 725 and 60991, that added together give a palindrome (61716).

The spelling of 72560991 in words is "seventy-two million, five hundred sixty thousand, nine hundred ninety-one".