72797787 has 6 divisors (see below), whose sum is σ = 105152372. Its totient is φ = 48531852.

The previous prime is 72797761. The next prime is 72797807. The reversal of 72797787 is 78779727.

It is not a de Polignac number, because 72797787 - 2¹¹ = 72795739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72797707) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4044313 + ... + 4044330.

Almost surely, 2^72797787 is an apocalyptic number.

72797787 is a deficient number, since it is larger than the sum of its proper divisors (32354585).

72797787 is a wasteful number, since it uses less digits than its factorization.

72797787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8088649 (or 8088646 counting only the distinct ones).

The product of its digits is 2420208, while the sum is 54.

The square root of 72797787 is about 8532.1619182948. The cubic root of 72797787 is about 417.5476647267.

The spelling of 72797787 in words is "seventy-two million, seven hundred ninety-seven thousand, seven hundred eighty-seven".