99959553 has 24 divisors (see below), whose sum is σ = 148082688. Its totient is φ = 64946112.

The previous prime is 99959521. The next prime is 99959591. The reversal of 99959553 is 35595999.

It is not a de Polignac number, because 99959553 - 2⁵ = 99959521 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 99959553.

It is not an unprimeable number, because it can be changed into a prime (99959653) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 161701 + ... + 162317.

It is an arithmetic number, because the mean of its divisors is an integer number (6170112).

Almost surely, 2^99959553 is an apocalyptic number.

It is an amenable number.

99959553 is a deficient number, since it is larger than the sum of its proper divisors (48123135).

99959553 is a wasteful number, since it uses less digits than its factorization.

99959553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053 (or 1050 counting only the distinct ones).

The product of its digits is 2460375, while the sum is 54.

The square root of 99959553 is about 9997.9774454637. The cubic root of 99959553 is about 464.0962954744.

The spelling of 99959553 in words is "ninety-nine million, nine hundred fifty-nine thousand, five hundred fifty-three".