99171744 has 96 divisors (see below), whose sum is σ = 315052416. Its totient is φ = 26664960.

The previous prime is 99171713. The next prime is 99171757. The reversal of 99171744 is 44717199.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 99171696 and 99171705.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7084 + ... + 15764.

It is an arithmetic number, because the mean of its divisors is an integer number (3281796).

Almost surely, 2^99171744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99171744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157526208).

99171744 is an abundant number, since it is smaller than the sum of its proper divisors (215880672).

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

99171744 is a wasteful number, since it uses less digits than its factorization.

99171744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8718 (or 8710 counting only the distinct ones).

The product of its digits is 63504, while the sum is 42.

The square root of 99171744 is about 9958.5010920319. The cubic root of 99171744 is about 462.8738544274.

The spelling of 99171744 in words is "ninety-nine million, one hundred seventy-one thousand, seven hundred forty-four".