78853979 has 8 divisors (see below), whose sum is σ = 79801920. Its totient is φ = 77910336.

The previous prime is 78853967. The next prime is 78853981. The reversal of 78853979 is 97935887.

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-78853979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78853079) 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, 49022 + ... + 50604.

It is an arithmetic number, because the mean of its divisors is an integer number (9975240).

Almost surely, 2^78853979 is an apocalyptic number.

78853979 is a deficient number, since it is larger than the sum of its proper divisors (947941).

78853979 is a wasteful number, since it uses less digits than its factorization.

78853979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2149.

The product of its digits is 3810240, while the sum is 56.

The square root of 78853979 is about 8879.9762950134. The cubic root of 78853979 is about 428.8195113777.

The spelling of 78853979 in words is "seventy-eight million, eight hundred fifty-three thousand, nine hundred seventy-nine".