87013859 has 2 divisors, whose sum is σ = 87013860. Its totient is φ = 87013858.

The previous prime is 87013799. The next prime is 87013889. The reversal of 87013859 is 95831078.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87013859 - 2¹² = 87009763 is a prime.

It is not a weakly prime, because it can be changed into another prime (87013889) 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, 43506929 + 43506930.

It is an arithmetic number, because the mean of its divisors is an integer number (43506930).

Almost surely, 2^87013859 is an apocalyptic number.

87013859 is a deficient number, since it is larger than the sum of its proper divisors (1).

87013859 is an equidigital number, since it uses as much as digits as its factorization.

87013859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 87013859 is about 9328.1219438856. The cubic root of 87013859 is about 443.1282896132.

The spelling of 87013859 in words is "eighty-seven million, thirteen thousand, eight hundred fifty-nine".