99959143 has 4 divisors (see below), whose sum is σ = 103406040. Its totient is φ = 96512248.

The previous prime is 99959137. The next prime is 99959161. The reversal of 99959143 is 34195999.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99959143 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99953143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1723405 + ... + 1723462.

It is an arithmetic number, because the mean of its divisors is an integer number (25851510).

Almost surely, 2^99959143 is an apocalyptic number.

99959143 is a deficient number, since it is larger than the sum of its proper divisors (3446897).

99959143 is a wasteful number, since it uses less digits than its factorization.

99959143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3446896.

The product of its digits is 393660, while the sum is 49.

The square root of 99959143 is about 9997.9569412956. The cubic root of 99959143 is about 464.0956609519.

The spelling of 99959143 in words is "ninety-nine million, nine hundred fifty-nine thousand, one hundred forty-three".