99796821 has 8 divisors (see below), whose sum is σ = 133458624. Its totient is φ = 66333120.

The previous prime is 99796811. The next prime is 99796841. The reversal of 99796821 is 12869799.

It is a happy number.

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

It is not a de Polignac number, because 99796821 - 2⁷ = 99796693 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99796811) 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, 48345 + ... + 50366.

It is an arithmetic number, because the mean of its divisors is an integer number (16682328).

Almost surely, 2^99796821 is an apocalyptic number.

It is an amenable number.

99796821 is a deficient number, since it is larger than the sum of its proper divisors (33661803).

99796821 is a wasteful number, since it uses less digits than its factorization.

99796821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99051.

The product of its digits is 489888, while the sum is 51.

The square root of 99796821 is about 9989.8358845378. The cubic root of 99796821 is about 463.8443124251.

The spelling of 99796821 in words is "ninety-nine million, seven hundred ninety-six thousand, eight hundred twenty-one".