79877827 has 4 divisors (see below), whose sum is σ = 83350800. Its totient is φ = 76404856.

The previous prime is 79877821. The next prime is 79877887. The reversal of 79877827 is 72877897.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 79877827 - 2¹⁹ = 79353539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79877821) 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, 1736452 + ... + 1736497.

It is an arithmetic number, because the mean of its divisors is an integer number (20837700).

Almost surely, 2^79877827 is an apocalyptic number.

79877827 is a deficient number, since it is larger than the sum of its proper divisors (3472973).

79877827 is a wasteful number, since it uses less digits than its factorization.

79877827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3472972.

The product of its digits is 2765952, while the sum is 55.

The square root of 79877827 is about 8937.4396221737. The cubic root of 79877827 is about 430.6674814620.

The spelling of 79877827 in words is "seventy-nine million, eight hundred seventy-seven thousand, eight hundred twenty-seven".