90963991 has 8 divisors (see below), whose sum is σ = 96463440. Its totient is φ = 85481088.

The previous prime is 90963979. The next prime is 90964007. The reversal of 90963991 is 19936909.

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 90963991 - 2⁵ = 90963959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90963491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8280 + ... + 15826.

It is an arithmetic number, because the mean of its divisors is an integer number (12057930).

Almost surely, 2^90963991 is an apocalyptic number.

90963991 is a deficient number, since it is larger than the sum of its proper divisors (5499449).

90963991 is a wasteful number, since it uses less digits than its factorization.

90963991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8273.

The product of its (nonzero) digits is 118098, while the sum is 46.

The square root of 90963991 is about 9537.5044429872. The cubic root of 90963991 is about 449.7348083584.

The spelling of 90963991 in words is "ninety million, nine hundred sixty-three thousand, nine hundred ninety-one".