72612987 has 8 divisors (see below), whose sum is σ = 97244736. Its totient is φ = 48194952.

The previous prime is 72612949. The next prime is 72613019. The reversal of 72612987 is 78921627.

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

It is not a de Polignac number, because 72612987 - 2¹⁰ = 72611963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72612937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52633 + ... + 53994.

It is an arithmetic number, because the mean of its divisors is an integer number (12155592).

Almost surely, 2^72612987 is an apocalyptic number.

72612987 is a deficient number, since it is larger than the sum of its proper divisors (24631749).

72612987 is a wasteful number, since it uses less digits than its factorization.

72612987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106857.

The product of its digits is 84672, while the sum is 42.

The square root of 72612987 is about 8521.3254250733. The cubic root of 72612987 is about 417.1940450291.

The spelling of 72612987 in words is "seventy-two million, six hundred twelve thousand, nine hundred eighty-seven".