90911663 has 8 divisors (see below), whose sum is σ = 95127648. Its totient is φ = 86717664.

The previous prime is 90911659. The next prime is 90911669. The reversal of 90911663 is 36611909.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90911663 - 2² = 90911659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90911669) 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 in 7 ways as a sum of consecutive naturals, for example, 3281 + ... + 13877.

It is an arithmetic number, because the mean of its divisors is an integer number (11890956).

Almost surely, 2^90911663 is an apocalyptic number.

90911663 is a deficient number, since it is larger than the sum of its proper divisors (4215985).

90911663 is a wasteful number, since it uses less digits than its factorization.

90911663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10993.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 90911663 is about 9534.7607730871. The cubic root of 90911663 is about 449.6485535781.

The spelling of 90911663 in words is "ninety million, nine hundred eleven thousand, six hundred sixty-three".