79877093 has 4 divisors (see below), whose sum is σ = 79917420. Its totient is φ = 79836768.

The previous prime is 79877089. The next prime is 79877099. The reversal of 79877093 is 39077897.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39077897 = 23 ⋅1699039.

It can be written as a sum of positive squares in 2 ways, for example, as 57047809 + 22829284 = 7553^2 + 4778^2 .

It is a cyclic number.

It is not a de Polignac number, because 79877093 - 2² = 79877089 is a prime.

It is a super-2 number, since 2×79877093² = 12760699972261298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79877099) 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, 17030 + ... + 21207.

It is an arithmetic number, because the mean of its divisors is an integer number (19979355).

Almost surely, 2^79877093 is an apocalyptic number.

It is an amenable number.

79877093 is a deficient number, since it is larger than the sum of its proper divisors (40327).

79877093 is a wasteful number, since it uses less digits than its factorization.

79877093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40326.

The product of its (nonzero) digits is 666792, while the sum is 50.

The square root of 79877093 is about 8937.3985588649. The cubic root of 79877093 is about 430.6661623187. Note that the first 3 decimals are identical.

The spelling of 79877093 in words is "seventy-nine million, eight hundred seventy-seven thousand, ninety-three".