79899967 has 8 divisors (see below), whose sum is σ = 92256416. Its totient is φ = 67779072.

The previous prime is 79899961. The next prime is 79899973. The reversal of 79899967 is 76999897.

It is an interprime number because it is at equal distance from previous prime (79899961) and next prime (79899973).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79899967 - 2¹⁹ = 79375679 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79899899 and 79899908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79899961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58158 + ... + 59515.

It is an arithmetic number, because the mean of its divisors is an integer number (11532052).

Almost surely, 2^79899967 is an apocalyptic number.

79899967 is a deficient number, since it is larger than the sum of its proper divisors (12356449).

79899967 is a wasteful number, since it uses less digits than its factorization.

79899967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117777.

The product of its digits is 15431472, while the sum is 64.

The square root of 79899967 is about 8938.6781461243. The cubic root of 79899967 is about 430.7072676271.

It can be divided in two parts, 7989996 and 7, that added together give a triangular number (7990003 = T₃₉₉₇).

The spelling of 79899967 in words is "seventy-nine million, eight hundred ninety-nine thousand, nine hundred sixty-seven".