88686391 has 2 divisors, whose sum is σ = 88686392. Its totient is φ = 88686390.

The previous prime is 88686349. The next prime is 88686397. The reversal of 88686391 is 19368688.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 88686391 - 2⁹ = 88685879 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88686397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44343195 + 44343196.

It is an arithmetic number, because the mean of its divisors is an integer number (44343196).

Almost surely, 2^88686391 is an apocalyptic number.

88686391 is a deficient number, since it is larger than the sum of its proper divisors (1).

88686391 is an equidigital number, since it uses as much as digits as its factorization.

88686391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 497664, while the sum is 49.

The square root of 88686391 is about 9417.3452203899. The cubic root of 88686391 is about 445.9494788169.

The spelling of 88686391 in words is "eighty-eight million, six hundred eighty-six thousand, three hundred ninety-one".