99621154 has 4 divisors (see below), whose sum is σ = 149431734. Its totient is φ = 49810576.

The previous prime is 99621149. The next prime is 99621157. The reversal of 99621154 is 45112699.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 74390625 + 25230529 = 8625^2 + 5023^2 .

It is not an unprimeable number, because it can be changed into a prime (99621157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24905287 + ... + 24905290.

Almost surely, 2^99621154 is an apocalyptic number.

99621154 is a deficient number, since it is larger than the sum of its proper divisors (49810580).

99621154 is a wasteful number, since it uses less digits than its factorization.

99621154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49810579.

The product of its digits is 19440, while the sum is 37.

The square root of 99621154 is about 9981.0397253994. The cubic root of 99621154 is about 463.5719924775.

The spelling of 99621154 in words is "ninety-nine million, six hundred twenty-one thousand, one hundred fifty-four".