99620451 has 24 divisors (see below), whose sum is σ = 165761024. Its totient is φ = 56473200.

The previous prime is 99620449. The next prime is 99620471. The reversal of 99620451 is 15402699.

It is not a de Polignac number, because 99620451 - 2¹ = 99620449 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99620431) 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 23 ways as a sum of consecutive naturals, for example, 1776 + ... + 14226.

Almost surely, 2^99620451 is an apocalyptic number.

99620451 is a deficient number, since it is larger than the sum of its proper divisors (66140573).

99620451 is a wasteful number, since it uses less digits than its factorization.

99620451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12591 (or 12588 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 99620451 is about 9981.0045085653. The cubic root of 99620451 is about 463.5709020402.

The spelling of 99620451 in words is "ninety-nine million, six hundred twenty thousand, four hundred fifty-one".