90875987 has 2 divisors, whose sum is σ = 90875988. Its totient is φ = 90875986.

The previous prime is 90875963. The next prime is 90876007. The reversal of 90875987 is 78957809.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90875987 - 2⁸ = 90875731 is a prime.

It is not a weakly prime, because it can be changed into another prime (90875927) 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, 45437993 + 45437994.

It is an arithmetic number, because the mean of its divisors is an integer number (45437994).

Almost surely, 2^90875987 is an apocalyptic number.

90875987 is a deficient number, since it is larger than the sum of its proper divisors (1).

90875987 is an equidigital number, since it uses as much as digits as its factorization.

90875987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1270080, while the sum is 53.

The square root of 90875987 is about 9532.8897507524. The cubic root of 90875987 is about 449.5897281201.

The spelling of 90875987 in words is "ninety million, eight hundred seventy-five thousand, nine hundred eighty-seven".