87915187 has 2 divisors, whose sum is σ = 87915188. Its totient is φ = 87915186.

The previous prime is 87915053. The next prime is 87915257. The reversal of 87915187 is 78151978.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87915187 - 2¹⁵ = 87882419 is a prime.

It is not a weakly prime, because it can be changed into another prime (87915787) 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, 43957593 + 43957594.

It is an arithmetic number, because the mean of its divisors is an integer number (43957594).

Almost surely, 2^87915187 is an apocalyptic number.

87915187 is a deficient number, since it is larger than the sum of its proper divisors (1).

87915187 is an equidigital number, since it uses as much as digits as its factorization.

87915187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 46.

The square root of 87915187 is about 9376.3098818245. The cubic root of 87915187 is about 444.6530764071.

The spelling of 87915187 in words is "eighty-seven million, nine hundred fifteen thousand, one hundred eighty-seven".