87312263 has 2 divisors, whose sum is σ = 87312264. Its totient is φ = 87312262.

The previous prime is 87312257. The next prime is 87312283. The reversal of 87312263 is 36221378.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87312263 - 2⁸ = 87312007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87312283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43656131 + 43656132.

It is an arithmetic number, because the mean of its divisors is an integer number (43656132).

Almost surely, 2^87312263 is an apocalyptic number.

87312263 is a deficient number, since it is larger than the sum of its proper divisors (1).

87312263 is an equidigital number, since it uses as much as digits as its factorization.

87312263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 32.

The square root of 87312263 is about 9344.1031137290. The cubic root of 87312263 is about 443.6342641239.

The spelling of 87312263 in words is "eighty-seven million, three hundred twelve thousand, two hundred sixty-three".