79277985 has 12 divisors (see below), whose sum is σ = 137415252. Its totient is φ = 42281568.

The previous prime is 79277977. The next prime is 79277993. The reversal of 79277985 is 58977297.

It is an interprime number because it is at equal distance from previous prime (79277977) and next prime (79277993).

It can be written as a sum of positive squares in 2 ways, for example, as 48108096 + 31169889 = 6936^2 + 5583^2 .

It is not a de Polignac number, because 79277985 - 2³ = 79277977 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 880822 + ... + 880911.

It is an arithmetic number, because the mean of its divisors is an integer number (11451271).

Almost surely, 2^79277985 is an apocalyptic number.

It is an amenable number.

79277985 is a deficient number, since it is larger than the sum of its proper divisors (58137267).

79277985 is a wasteful number, since it uses less digits than its factorization.

79277985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1761744 (or 1761741 counting only the distinct ones).

The product of its digits is 2222640, while the sum is 54.

The square root of 79277985 is about 8903.8185628415. The cubic root of 79277985 is about 429.5867401471.

The spelling of 79277985 in words is "seventy-nine million, two hundred seventy-seven thousand, nine hundred eighty-five".