79361857 has 4 divisors (see below), whose sum is σ = 79670916. Its totient is φ = 79052800.

The previous prime is 79361827. The next prime is 79361869. The reversal of 79361857 is 75816397.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75816397 = 1021 ⋅74257.

It can be written as a sum of positive squares in 2 ways, for example, as 67223601 + 12138256 = 8199^2 + 3484^2 .

It is a cyclic number.

It is not a de Polignac number, because 79361857 - 2¹⁹ = 78837569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79361827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154144 + ... + 154657.

It is an arithmetic number, because the mean of its divisors is an integer number (19917729).

Almost surely, 2^79361857 is an apocalyptic number.

It is an amenable number.

79361857 is a deficient number, since it is larger than the sum of its proper divisors (309059).

79361857 is a wasteful number, since it uses less digits than its factorization.

79361857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309058.

The product of its digits is 317520, while the sum is 46.

The square root of 79361857 is about 8908.5272071202. The cubic root of 79361857 is about 429.7381802578.

The spelling of 79361857 in words is "seventy-nine million, three hundred sixty-one thousand, eight hundred fifty-seven".