99289621 has 4 divisors (see below), whose sum is σ = 102492544. Its totient is φ = 96086700.

The previous prime is 99289613. The next prime is 99289627. The reversal of 99289621 is 12698299.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 99289621 - 2³ = 99289613 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 (99289627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1601415 + ... + 1601476.

It is an arithmetic number, because the mean of its divisors is an integer number (25623136).

Almost surely, 2^99289621 is an apocalyptic number.

It is an amenable number.

99289621 is a deficient number, since it is larger than the sum of its proper divisors (3202923).

99289621 is a wasteful number, since it uses less digits than its factorization.

99289621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3202922.

The product of its digits is 139968, while the sum is 46.

The square root of 99289621 is about 9964.4177451570. The cubic root of 99289621 is about 463.0571747147.

The spelling of 99289621 in words is "ninety-nine million, two hundred eighty-nine thousand, six hundred twenty-one".