78880971 has 16 divisors (see below), whose sum is σ = 114087680. Its totient is φ = 48189600.

The previous prime is 78880943. The next prime is 78880979. The reversal of 78880971 is 17908887.

It is not a de Polignac number, because 78880971 - 2¹¹ = 78878923 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78880971.

It is not an unprimeable number, because it can be changed into a prime (78880979) 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 15 ways as a sum of consecutive naturals, for example, 1855 + ... + 12696.

It is an arithmetic number, because the mean of its divisors is an integer number (7130480).

Almost surely, 2^78880971 is an apocalyptic number.

78880971 is a deficient number, since it is larger than the sum of its proper divisors (35206709).

78880971 is a wasteful number, since it uses less digits than its factorization.

78880971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14706.

The product of its (nonzero) digits is 225792, while the sum is 48.

The square root of 78880971 is about 8881.4959888523. The cubic root of 78880971 is about 428.8684346151.

The spelling of 78880971 in words is "seventy-eight million, eight hundred eighty thousand, nine hundred seventy-one".