87686231 has 2 divisors, whose sum is σ = 87686232. Its totient is φ = 87686230.

The previous prime is 87686201. The next prime is 87686239. The reversal of 87686231 is 13268678.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87686231 is a prime.

It is a super-2 number, since 2×87686231² = 15377750213970722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87686239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43843115 + 43843116.

It is an arithmetic number, because the mean of its divisors is an integer number (43843116).

Almost surely, 2^87686231 is an apocalyptic number.

87686231 is a deficient number, since it is larger than the sum of its proper divisors (1).

87686231 is an equidigital number, since it uses as much as digits as its factorization.

87686231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 41.

The square root of 87686231 is about 9364.0926415751. The cubic root of 87686231 is about 444.2667400659.

The spelling of 87686231 in words is "eighty-seven million, six hundred eighty-six thousand, two hundred thirty-one".