88991311 has 8 divisors (see below), whose sum is σ = 94343184. Its totient is φ = 83652480.

The previous prime is 88991291. The next prime is 88991363. The reversal of 88991311 is 11319988.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 88991311 - 2⁷ = 88991183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88991911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13216 + ... + 18778.

It is an arithmetic number, because the mean of its divisors is an integer number (11792898).

Almost surely, 2^88991311 is an apocalyptic number.

88991311 is a deficient number, since it is larger than the sum of its proper divisors (5351873).

88991311 is a wasteful number, since it uses less digits than its factorization.

88991311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6521.

The product of its digits is 15552, while the sum is 40.

The square root of 88991311 is about 9433.5206047371. The cubic root of 88991311 is about 446.4599794339.

The spelling of 88991311 in words is "eighty-eight million, nine hundred ninety-one thousand, three hundred eleven".