99979953 has 8 divisors (see below), whose sum is σ = 133353600. Its totient is φ = 66629808.

The previous prime is 99979933. The next prime is 99979961. The reversal of 99979953 is 35997999.

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

It is not a de Polignac number, because 99979953 - 2¹² = 99975857 is a prime.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (99979903) 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, 10888 + ... + 17846.

It is an arithmetic number, because the mean of its divisors is an integer number (16669200).

Almost surely, 2^99979953 is an apocalyptic number.

It is an amenable number.

99979953 is a deficient number, since it is larger than the sum of its proper divisors (33373647).

99979953 is a wasteful number, since it uses less digits than its factorization.

99979953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11751.

The product of its digits is 6200145, while the sum is 60.

The square root of 99979953 is about 9998.9975997597. The cubic root of 99979953 is about 464.1278646446.

The spelling of 99979953 in words is "ninety-nine million, nine hundred seventy-nine thousand, nine hundred fifty-three".