79873987 has 8 divisors (see below), whose sum is σ = 80705520. Its totient is φ = 79046400.

The previous prime is 79873979. The next prime is 79873991. The reversal of 79873987 is 78937897.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 79873987 - 2³ = 79873979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79573987) 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 7 ways as a sum of consecutive naturals, for example, 55023 + ... + 56455.

It is an arithmetic number, because the mean of its divisors is an integer number (10088190).

Almost surely, 2^79873987 is an apocalyptic number.

79873987 is a deficient number, since it is larger than the sum of its proper divisors (831533).

79873987 is a wasteful number, since it uses less digits than its factorization.

79873987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1973.

The product of its digits is 5334336, while the sum is 58.

The square root of 79873987 is about 8937.2247929657. The cubic root of 79873987 is about 430.6605801324.

The spelling of 79873987 in words is "seventy-nine million, eight hundred seventy-three thousand, nine hundred eighty-seven".