96991999 has 8 divisors (see below), whose sum is σ = 104529600. Its totient is φ = 89465376.

The previous prime is 96991991. The next prime is 96992011. The reversal of 96991999 is 99919969.

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

It is not a de Polignac number, because 96991999 - 2³ = 96991991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (96991991) 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, 31674 + ... + 34600.

It is an arithmetic number, because the mean of its divisors is an integer number (13066200).

Almost surely, 2^96991999 is an apocalyptic number.

96991999 is a deficient number, since it is larger than the sum of its proper divisors (7537601).

96991999 is a wasteful number, since it uses less digits than its factorization.

96991999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5489.

The product of its digits is 3188646, while the sum is 61.

The square root of 96991999 is about 9848.4516041863. The cubic root of 96991999 is about 459.4574558143.

The spelling of 96991999 in words is "ninety-six million, nine hundred ninety-one thousand, nine hundred ninety-nine".