79869867 has 16 divisors (see below), whose sum is σ = 132771072. Its totient is φ = 41490720.

The previous prime is 79869851. The next prime is 79869871. The reversal of 79869867 is 76896897.

It is not a de Polignac number, because 79869867 - 2⁴ = 79869851 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79869867.

It is not an unprimeable number, because it can be changed into a prime (79869827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172648 + ... + 173109.

It is an arithmetic number, because the mean of its divisors is an integer number (8298192).

Almost surely, 2^79869867 is an apocalyptic number.

79869867 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

79869867 is a deficient number, since it is larger than the sum of its proper divisors (52901205).

79869867 is a wasteful number, since it uses less digits than its factorization.

79869867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345778.

The product of its digits is 9144576, while the sum is 60.

The square root of 79869867 is about 8936.9942933852. The cubic root of 79869867 is about 430.6531753349.

The spelling of 79869867 in words is "seventy-nine million, eight hundred sixty-nine thousand, eight hundred sixty-seven".