87311867 has 2 divisors, whose sum is σ = 87311868. Its totient is φ = 87311866.

The previous prime is 87311843. The next prime is 87311899. The reversal of 87311867 is 76811378.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87311867 - 2¹⁰ = 87310843 is a prime.

It is not a weakly prime, because it can be changed into another prime (87301867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43655933 + 43655934.

It is an arithmetic number, because the mean of its divisors is an integer number (43655934).

Almost surely, 2^87311867 is an apocalyptic number.

87311867 is a deficient number, since it is larger than the sum of its proper divisors (1).

87311867 is an equidigital number, since it uses as much as digits as its factorization.

87311867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 41.

The square root of 87311867 is about 9344.0819238703. The cubic root of 87311867 is about 443.6335934299.

The spelling of 87311867 in words is "eighty-seven million, three hundred eleven thousand, eight hundred sixty-seven".