90517907 has 2 divisors, whose sum is σ = 90517908. Its totient is φ = 90517906.

The previous prime is 90517897. The next prime is 90517909. The reversal of 90517907 is 70971509.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90517907 - 2¹⁰ = 90516883 is a prime.

Together with 90517909, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90517909) 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, 45258953 + 45258954.

It is an arithmetic number, because the mean of its divisors is an integer number (45258954).

Almost surely, 2^90517907 is an apocalyptic number.

90517907 is a deficient number, since it is larger than the sum of its proper divisors (1).

90517907 is an equidigital number, since it uses as much as digits as its factorization.

90517907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19845, while the sum is 38.

The square root of 90517907 is about 9514.0899196928. The cubic root of 90517907 is about 448.9984424626.

The spelling of 90517907 in words is "ninety million, five hundred seventeen thousand, nine hundred seven".