90877187 has 2 divisors, whose sum is σ = 90877188. Its totient is φ = 90877186.

The previous prime is 90877147. The next prime is 90877201. The reversal of 90877187 is 78177809.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90877187 - 2⁶ = 90877123 is a prime.

It is not a weakly prime, because it can be changed into another prime (90877147) 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, 45438593 + 45438594.

It is an arithmetic number, because the mean of its divisors is an integer number (45438594).

Almost surely, 2^90877187 is an apocalyptic number.

90877187 is a deficient number, since it is larger than the sum of its proper divisors (1).

90877187 is an equidigital number, since it uses as much as digits as its factorization.

90877187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 197568, while the sum is 47.

The square root of 90877187 is about 9532.9526905361. The cubic root of 90877187 is about 449.5917070268.

The spelling of 90877187 in words is "ninety million, eight hundred seventy-seven thousand, one hundred eighty-seven".