99831645 has 24 divisors (see below), whose sum is σ = 173287296. Its totient is φ = 53167968.

The previous prime is 99831581. The next prime is 99831703. The reversal of 99831645 is 54613899.

It is a happy number.

It is not a de Polignac number, because 99831645 - 2⁶ = 99831581 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 99831645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46792 + ... + 48878.

It is an arithmetic number, because the mean of its divisors is an integer number (7220304).

Almost surely, 2^99831645 is an apocalyptic number.

It is an amenable number.

99831645 is a deficient number, since it is larger than the sum of its proper divisors (73455651).

99831645 is a wasteful number, since it uses less digits than its factorization.

99831645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3161 (or 3158 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 99831645 is about 9991.5787040888. The cubic root of 99831645 is about 463.8982588190.

It can be divided in two parts, 9983 and 1645, that added together give a triangular number (11628 = T₁₅₂).

The spelling of 99831645 in words is "ninety-nine million, eight hundred thirty-one thousand, six hundred forty-five".