99955979 has 8 divisors (see below), whose sum is σ = 105386640. Its totient is φ = 94542336.

The previous prime is 99955967. The next prime is 99955993. The reversal of 99955979 is 97955999.

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 99955979 - 2¹⁶ = 99890443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99955939) 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, 8879 + ... + 16695.

It is an arithmetic number, because the mean of its divisors is an integer number (13173330).

Almost surely, 2^99955979 is an apocalyptic number.

99955979 is a deficient number, since it is larger than the sum of its proper divisors (5430661).

99955979 is a wasteful number, since it uses less digits than its factorization.

99955979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8509.

The product of its digits is 10333575, while the sum is 62.

The square root of 99955979 is about 9997.7987077156. The cubic root of 99955979 is about 464.0907642374.

The spelling of 99955979 in words is "ninety-nine million, nine hundred fifty-five thousand, nine hundred seventy-nine".