87806231 has 2 divisors, whose sum is σ = 87806232. Its totient is φ = 87806230.

The previous prime is 87806227. The next prime is 87806261. The reversal of 87806231 is 13260878.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87806231 - 2² = 87806227 is a prime.

It is a super-2 number, since 2×87806231² = 15419868404850722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 87806191 and 87806200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87806261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43903115 + 43903116.

It is an arithmetic number, because the mean of its divisors is an integer number (43903116).

Almost surely, 2^87806231 is an apocalyptic number.

87806231 is a deficient number, since it is larger than the sum of its proper divisors (1).

87806231 is an equidigital number, since it uses as much as digits as its factorization.

87806231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 87806231 is about 9370.4979056612. The cubic root of 87806231 is about 444.4693097176.

The spelling of 87806231 in words is "eighty-seven million, eight hundred six thousand, two hundred thirty-one".