99579817 has 4 divisors (see below), whose sum is σ = 104820880. Its totient is φ = 94338756.

The previous prime is 99579803. The next prime is 99579827. The reversal of 99579817 is 71897599.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71897599 = 109 ⋅659611.

It is a cyclic number.

It is not a de Polignac number, because 99579817 - 2²³ = 91191209 is a prime.

It is a super-2 number, since 2×99579817² = 19832279907506978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99579827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2620503 + ... + 2620540.

It is an arithmetic number, because the mean of its divisors is an integer number (26205220).

Almost surely, 2^99579817 is an apocalyptic number.

It is an amenable number.

99579817 is a deficient number, since it is larger than the sum of its proper divisors (5241063).

99579817 is a wasteful number, since it uses less digits than its factorization.

99579817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5241062.

The product of its digits is 1428840, while the sum is 55.

The square root of 99579817 is about 9978.9687342931. The cubic root of 99579817 is about 463.5078651118.

The spelling of 99579817 in words is "ninety-nine million, five hundred seventy-nine thousand, eight hundred seventeen".