79999667 has 4 divisors (see below), whose sum is σ = 87272376. Its totient is φ = 72726960.

The previous prime is 79999663. The next prime is 79999679. The reversal of 79999667 is 76699997.

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 79999667 - 2² = 79999663 is a prime.

It is a super-2 number, since 2×79999667² = 12799893440221778, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79999663) 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, 3636338 + ... + 3636359.

It is an arithmetic number, because the mean of its divisors is an integer number (21818094).

Almost surely, 2^79999667 is an apocalyptic number.

79999667 is a deficient number, since it is larger than the sum of its proper divisors (7272709).

79999667 is a wasteful number, since it uses less digits than its factorization.

79999667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7272708.

The product of its digits is 11573604, while the sum is 62.

The square root of 79999667 is about 8944.2532947139. The cubic root of 79999667 is about 430.8863401499.

The spelling of 79999667 in words is "seventy-nine million, nine hundred ninety-nine thousand, six hundred sixty-seven".