79642987 has 8 divisors (see below), whose sum is σ = 80498592. Its totient is φ = 78792000.

The previous prime is 79642949. The next prime is 79642991. The reversal of 79642987 is 78924697.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79642987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79642187) 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, 41493 + ... + 43369.

It is an arithmetic number, because the mean of its divisors is an integer number (10062324).

Almost surely, 2^79642987 is an apocalyptic number.

79642987 is a deficient number, since it is larger than the sum of its proper divisors (855605).

79642987 is a wasteful number, since it uses less digits than its factorization.

79642987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2309.

The product of its digits is 1524096, while the sum is 52.

The square root of 79642987 is about 8924.2919607104. The cubic root of 79642987 is about 430.2450145013.

The spelling of 79642987 in words is "seventy-nine million, six hundred forty-two thousand, nine hundred eighty-seven".