99509144 has 32 divisors (see below), whose sum is σ = 215239680. Its totient is φ = 42245664.

The previous prime is 99509131. The next prime is 99509159. The reversal of 99509144 is 44190599.

It is a happy number.

It is a super-2 number, since 2×99509144² = 19804139479225472, which contains 22 as substring.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2312 + ... + 14295.

It is an arithmetic number, because the mean of its divisors is an integer number (6726240).

Almost surely, 2^99509144 is an apocalyptic number.

It is an amenable number.

99509144 is an abundant number, since it is smaller than the sum of its proper divisors (115730536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99509144 is a wasteful number, since it uses less digits than its factorization.

99509144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16727 (or 16723 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 99509144 is about 9975.4270084042. The cubic root of 99509144 is about 463.3981867825.

The spelling of 99509144 in words is "ninety-nine million, five hundred nine thousand, one hundred forty-four".