99955170 has 96 divisors (see below), whose sum is σ = 307307520. Its totient is φ = 22055040.

The previous prime is 99955169. The next prime is 99955183. The reversal of 99955170 is 7155999.

99955170 is a `hidden beast` number, since 9 + 99 + 551 + 7 + 0 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15535 + ... + 21005.

It is an arithmetic number, because the mean of its divisors is an integer number (3201120).

Almost surely, 2^99955170 is an apocalyptic number.

99955170 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 99955170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153653760).

99955170 is an abundant number, since it is smaller than the sum of its proper divisors (207352350).

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

99955170 is a wasteful number, since it uses less digits than its factorization.

99955170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5520 (or 5517 counting only the distinct ones).

The product of its (nonzero) digits is 127575, while the sum is 45.

The square root of 99955170 is about 9997.7582487276. The cubic root of 99955170 is about 464.0895121847.

It can be divided in two parts, 999 and 55170, that added together give a square (56169 = 237²).

The spelling of 99955170 in words is "ninety-nine million, nine hundred fifty-five thousand, one hundred seventy".