99637091 has 8 divisors (see below), whose sum is σ = 101350080. Its totient is φ = 97935552.

The previous prime is 99637079. The next prime is 99637099. The reversal of 99637091 is 19073699.

It is a happy number.

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 99637091 - 2¹⁰ = 99636067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99637099) 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, 15701 + ... + 21113.

It is an arithmetic number, because the mean of its divisors is an integer number (12668760).

Almost surely, 2^99637091 is an apocalyptic number.

99637091 is a deficient number, since it is larger than the sum of its proper divisors (1712989).

99637091 is a wasteful number, since it uses less digits than its factorization.

99637091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5725.

The product of its (nonzero) digits is 91854, while the sum is 44.

The square root of 99637091 is about 9981.8380571917. The cubic root of 99637091 is about 463.5967113002.

The spelling of 99637091 in words is "ninety-nine million, six hundred thirty-seven thousand, ninety-one".