88991143 has 4 divisors (see below), whose sum is σ = 89072928. Its totient is φ = 88909360.

The previous prime is 88991129. The next prime is 88991183. The reversal of 88991143 is 34119988.

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 88991143 - 2²¹ = 86893991 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 88991143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88991113) 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, 39238 + ... + 41443.

It is an arithmetic number, because the mean of its divisors is an integer number (22268232).

Almost surely, 2^88991143 is an apocalyptic number.

88991143 is a deficient number, since it is larger than the sum of its proper divisors (81785).

88991143 is a wasteful number, since it uses less digits than its factorization.

88991143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81784.

The product of its digits is 62208, while the sum is 43.

The square root of 88991143 is about 9433.5117003161. The cubic root of 88991143 is about 446.4596984876.

The spelling of 88991143 in words is "eighty-eight million, nine hundred ninety-one thousand, one hundred forty-three".