99806179 has 4 divisors (see below), whose sum is σ = 108879480. Its totient is φ = 90732880.

The previous prime is 99806173. The next prime is 99806227. The reversal of 99806179 is 97160899.

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 99806179 - 2³ = 99806171 is a prime.

It is a super-2 number, since 2×99806179² = 19922546733160082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99806171) 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, 4536634 + ... + 4536655.

It is an arithmetic number, because the mean of its divisors is an integer number (27219870).

Almost surely, 2^99806179 is an apocalyptic number.

99806179 is a deficient number, since it is larger than the sum of its proper divisors (9073301).

99806179 is a wasteful number, since it uses less digits than its factorization.

99806179 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9073300.

The product of its (nonzero) digits is 244944, while the sum is 49.

The square root of 99806179 is about 9990.3042496212. The cubic root of 99806179 is about 463.8588102797.

The spelling of 99806179 in words is "ninety-nine million, eight hundred six thousand, one hundred seventy-nine".