99363621 has 24 divisors (see below), whose sum is σ = 154786464. Its totient is φ = 56532000.

The previous prime is 99363601. The next prime is 99363679. The reversal of 99363621 is 12636399.

It is not a de Polignac number, because 99363621 - 2⁹ = 99363109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99363621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99363601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35551 + ... + 38243.

It is an arithmetic number, because the mean of its divisors is an integer number (6449436).

Almost surely, 2^99363621 is an apocalyptic number.

It is an amenable number.

99363621 is a deficient number, since it is larger than the sum of its proper divisors (55422843).

99363621 is a wasteful number, since it uses less digits than its factorization.

99363621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2961 (or 2954 counting only the distinct ones).

The product of its digits is 52488, while the sum is 39.

The square root of 99363621 is about 9968.1302660027. The cubic root of 99363621 is about 463.1721841229.

The spelling of 99363621 in words is "ninety-nine million, three hundred sixty-three thousand, six hundred twenty-one".