99317520 has 60 divisors (see below), whose sum is σ = 333543756. Its totient is φ = 26484480.

The previous prime is 99317513. The next prime is 99317527. The reversal of 99317520 is 2571399.

It is an interprime number because it is at equal distance from previous prime (99317513) and next prime (99317527).

It can be written as a sum of positive squares in 2 ways, for example, as 44675856 + 54641664 = 6684^2 + 7392^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (99317527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68251 + ... + 69690.

Almost surely, 2^99317520 is an apocalyptic number.

99317520 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

99317520 is an abundant number, since it is smaller than the sum of its proper divisors (234226236).

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

99317520 is a wasteful number, since it uses less digits than its factorization.

99317520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137960 (or 137951 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The square root of 99317520 is about 9965.8175781017. The cubic root of 99317520 is about 463.1005415244.

The spelling of 99317520 in words is "ninety-nine million, three hundred seventeen thousand, five hundred twenty".