90159659 has 2 divisors, whose sum is σ = 90159660. Its totient is φ = 90159658.

The previous prime is 90159631. The next prime is 90159661. The reversal of 90159659 is 95695109.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90159659 is a prime.

It is a super-2 number, since 2×90159659² = 16257528221992562, which contains 22 as substring.

Together with 90159661, 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 (90159259) 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, 45079829 + 45079830.

It is an arithmetic number, because the mean of its divisors is an integer number (45079830).

Almost surely, 2^90159659 is an apocalyptic number.

90159659 is a deficient number, since it is larger than the sum of its proper divisors (1).

90159659 is an equidigital number, since it uses as much as digits as its factorization.

90159659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 109350, while the sum is 44.

The square root of 90159659 is about 9495.2440200345. The cubic root of 90159659 is about 448.4053168493.

The spelling of 90159659 in words is "ninety million, one hundred fifty-nine thousand, six hundred fifty-nine".