99021197 has 12 divisors (see below), whose sum is σ = 109689888. Its totient is φ = 89317800.

The previous prime is 99021173. The next prime is 99021199. The reversal of 99021197 is 79112099.

It is not a de Polignac number, because 99021197 - 2¹⁴ = 99004813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99021197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99021199) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12728 + ... + 18974.

It is an arithmetic number, because the mean of its divisors is an integer number (9140824).

Almost surely, 2^99021197 is an apocalyptic number.

It is an amenable number.

99021197 is a deficient number, since it is larger than the sum of its proper divisors (10668691).

99021197 is a wasteful number, since it uses less digits than its factorization.

99021197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6400 (or 6389 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 38.

The square root of 99021197 is about 9950.9395033836. The cubic root of 99021197 is about 462.6395149595.

The spelling of 99021197 in words is "ninety-nine million, twenty-one thousand, one hundred ninety-seven".