88991291 has 2 divisors, whose sum is σ = 88991292. Its totient is φ = 88991290.

The previous prime is 88991267. The next prime is 88991363. The reversal of 88991291 is 19219988.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-88991291 is a prime.

It is not a weakly prime, because it can be changed into another prime (88991191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44495645 + 44495646.

It is an arithmetic number, because the mean of its divisors is an integer number (44495646).

Almost surely, 2^88991291 is an apocalyptic number.

88991291 is a deficient number, since it is larger than the sum of its proper divisors (1).

88991291 is an equidigital number, since it uses as much as digits as its factorization.

88991291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 47.

The square root of 88991291 is about 9433.5195446874. The cubic root of 88991291 is about 446.4599459879.

The spelling of 88991291 in words is "eighty-eight million, nine hundred ninety-one thousand, two hundred ninety-one".