72916791 has 8 divisors (see below), whose sum is σ = 102941424. Its totient is φ = 45751680.

The previous prime is 72916783. The next prime is 72916799. The reversal of 72916791 is 19761927.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (72916783) and next prime (72916799).

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

It is not a de Polignac number, because 72916791 - 2³ = 72916783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72916799) 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, 714820 + ... + 714921.

It is an arithmetic number, because the mean of its divisors is an integer number (12867678).

Almost surely, 2^72916791 is an apocalyptic number.

72916791 is a deficient number, since it is larger than the sum of its proper divisors (30024633).

72916791 is a wasteful number, since it uses less digits than its factorization.

72916791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1429761.

The product of its digits is 47628, while the sum is 42.

The square root of 72916791 is about 8539.1329185111. The cubic root of 72916791 is about 417.7750653688.

The spelling of 72916791 in words is "seventy-two million, nine hundred sixteen thousand, seven hundred ninety-one".