78976985 has 8 divisors (see below), whose sum is σ = 100347336. Its totient is φ = 59464960.

The previous prime is 78976979. The next prime is 78976993. The reversal of 78976985 is 58967987.

It can be written as a sum of positive squares in 4 ways, for example, as 30382144 + 48594841 = 5512^2 + 6971^2 .

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

It is not a de Polignac number, because 78976985 - 2¹² = 78972889 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 464486 + ... + 464655.

It is an arithmetic number, because the mean of its divisors is an integer number (12543417).

Almost surely, 2^78976985 is an apocalyptic number.

It is an amenable number.

78976985 is a deficient number, since it is larger than the sum of its proper divisors (21370351).

78976985 is a wasteful number, since it uses less digits than its factorization.

78976985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929163.

The product of its digits is 7620480, while the sum is 59.

The square root of 78976985 is about 8886.8996281043. The cubic root of 78976985 is about 429.0423704309.

The spelling of 78976985 in words is "seventy-eight million, nine hundred seventy-six thousand, nine hundred eighty-five".