99072143 has 4 divisors (see below), whose sum is σ = 99100248. Its totient is φ = 99044040.

The previous prime is 99072139. The next prime is 99072167. The reversal of 99072143 is 34127099.

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

It is a cyclic number.

It is not a de Polignac number, because 99072143 - 2² = 99072139 is a prime.

It is a super-2 number, since 2×99072143² = 19630579037224898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99072173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7853 + ... + 16118.

It is an arithmetic number, because the mean of its divisors is an integer number (24775062).

Almost surely, 2^99072143 is an apocalyptic number.

99072143 is a deficient number, since it is larger than the sum of its proper divisors (28105).

99072143 is a wasteful number, since it uses less digits than its factorization.

99072143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28104.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 99072143 is about 9953.4990330034. The cubic root of 99072143 is about 462.7188434010.

The spelling of 99072143 in words is "ninety-nine million, seventy-two thousand, one hundred forty-three".