90536993 has 16 divisors (see below), whose sum is σ = 98136576. Its totient is φ = 83307840.

The previous prime is 90536989. The next prime is 90537001. The reversal of 90536993 is 39963509.

It is not a de Polignac number, because 90536993 - 2² = 90536989 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90536933) 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 in 15 ways as a sum of consecutive naturals, for example, 65255 + ... + 66627.

It is an arithmetic number, because the mean of its divisors is an integer number (6133536).

Almost surely, 2^90536993 is an apocalyptic number.

It is an amenable number.

90536993 is a deficient number, since it is larger than the sum of its proper divisors (7599583).

90536993 is a wasteful number, since it uses less digits than its factorization.

90536993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1504.

The product of its (nonzero) digits is 196830, while the sum is 44.

The square root of 90536993 is about 9515.0929054844. The cubic root of 90536993 is about 449.0299978470.

The spelling of 90536993 in words is "ninety million, five hundred thirty-six thousand, nine hundred ninety-three".