99973520 has 20 divisors (see below), whose sum is σ = 232438620. Its totient is φ = 39989376.

The previous prime is 99973513. The next prime is 99973541. The reversal of 99973520 is 2537999.

It can be written as a sum of positive squares in 2 ways, for example, as 44142736 + 55830784 = 6644^2 + 7472^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 624755 + ... + 624914.

It is an arithmetic number, because the mean of its divisors is an integer number (11621931).

Almost surely, 2^99973520 is an apocalyptic number.

It is an amenable number.

99973520 is an abundant number, since it is smaller than the sum of its proper divisors (132465100).

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

99973520 is a wasteful number, since it uses less digits than its factorization.

99973520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249682 (or 1249676 counting only the distinct ones).

The product of its (nonzero) digits is 153090, while the sum is 44.

The square root of 99973520 is about 9998.6759123396. The cubic root of 99973520 is about 464.1179099870.

The spelling of 99973520 in words is "ninety-nine million, nine hundred seventy-three thousand, five hundred twenty".