88688191 has 2 divisors, whose sum is σ = 88688192. Its totient is φ = 88688190.

The previous prime is 88688123. The next prime is 88688209. The reversal of 88688191 is 19188688.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 88688191 - 2²¹ = 86591039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88688791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44344095 + 44344096.

It is an arithmetic number, because the mean of its divisors is an integer number (44344096).

Almost surely, 2^88688191 is an apocalyptic number.

88688191 is a deficient number, since it is larger than the sum of its proper divisors (1).

88688191 is an equidigital number, since it uses as much as digits as its factorization.

88688191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 221184, while the sum is 49.

The square root of 88688191 is about 9417.4407882397. The cubic root of 88688191 is about 445.9524958286.

The spelling of 88688191 in words is "eighty-eight million, six hundred eighty-eight thousand, one hundred ninety-one".