72716687 has 4 divisors (see below), whose sum is σ = 73712880. Its totient is φ = 71720496.

The previous prime is 72716681. The next prime is 72716711. The reversal of 72716687 is 78661727.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72716687 - 2¹⁰ = 72715663 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 (72716681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 497987 + ... + 498132.

It is an arithmetic number, because the mean of its divisors is an integer number (18428220).

Almost surely, 2^72716687 is an apocalyptic number.

72716687 is a deficient number, since it is larger than the sum of its proper divisors (996193).

72716687 is an equidigital number, since it uses as much as digits as its factorization.

72716687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996192.

The product of its digits is 197568, while the sum is 44.

The square root of 72716687 is about 8527.4079883632. The cubic root of 72716687 is about 417.3925515023.

The spelling of 72716687 in words is "seventy-two million, seven hundred sixteen thousand, six hundred eighty-seven".