78914971 has 4 divisors (see below), whose sum is σ = 79996072. Its totient is φ = 77833872.

The previous prime is 78914959. The next prime is 78914977. The reversal of 78914971 is 17941987.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78914971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78914977) 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 3 ways as a sum of consecutive naturals, for example, 540441 + ... + 540586.

It is an arithmetic number, because the mean of its divisors is an integer number (19999018).

Almost surely, 2^78914971 is an apocalyptic number.

78914971 is a deficient number, since it is larger than the sum of its proper divisors (1081101).

78914971 is a wasteful number, since it uses less digits than its factorization.

78914971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081100.

The product of its digits is 127008, while the sum is 46.

The square root of 78914971 is about 8883.4098745921. The cubic root of 78914971 is about 428.9300440336.

The spelling of 78914971 in words is "seventy-eight million, nine hundred fourteen thousand, nine hundred seventy-one".