88881191 has 4 divisors (see below), whose sum is σ = 101578512. Its totient is φ = 76183872.

The previous prime is 88881181. The next prime is 88881203. The reversal of 88881191 is 19118888.

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-88881191 is a prime.

It is a super-2 number, since 2×88881191² = 15799732227156962, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88881101) 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, 6348650 + ... + 6348663.

It is an arithmetic number, because the mean of its divisors is an integer number (25394628).

Almost surely, 2^88881191 is an apocalyptic number.

88881191 is a deficient number, since it is larger than the sum of its proper divisors (12697321).

88881191 is a wasteful number, since it uses less digits than its factorization.

88881191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12697320.

The product of its digits is 36864, while the sum is 44.

The square root of 88881191 is about 9427.6821647741. The cubic root of 88881191 is about 446.2757499650.

The spelling of 88881191 in words is "eighty-eight million, eight hundred eighty-one thousand, one hundred ninety-one".