90605799 has 12 divisors (see below), whose sum is σ = 131710696. Its totient is φ = 60018192.

The previous prime is 90605797. The next prime is 90605849. The reversal of 90605799 is 99750609.

It is not a de Polignac number, because 90605799 - 2¹ = 90605797 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 (90605791) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30649 + ... + 33474.

Almost surely, 2^90605799 is an apocalyptic number.

90605799 is a deficient number, since it is larger than the sum of its proper divisors (41104897).

90605799 is a wasteful number, since it uses less digits than its factorization.

90605799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64286 (or 64283 counting only the distinct ones).

The product of its (nonzero) digits is 153090, while the sum is 45.

The square root of 90605799 is about 9518.7078429795. The cubic root of 90605799 is about 449.1437198133.

The spelling of 90605799 in words is "ninety million, six hundred five thousand, seven hundred ninety-nine".