90605801 has 48 divisors (see below), whose sum is σ = 117635328. Its totient is φ = 68889600.

The previous prime is 90605797. The next prime is 90605849. The reversal of 90605801 is 10850609.

It is not a de Polignac number, because 90605801 - 2² = 90605797 is a prime.

It is a super-2 number, since 2×90605801² = 16418822349703202, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90605861) 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 47 ways as a sum of consecutive naturals, for example, 1485311 + ... + 1485371.

It is an arithmetic number, because the mean of its divisors is an integer number (2450736).

Almost surely, 2^90605801 is an apocalyptic number.

It is an amenable number.

90605801 is a deficient number, since it is larger than the sum of its proper divisors (27029527).

90605801 is a wasteful number, since it uses less digits than its factorization.

90605801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 90605801 is about 9518.7079480358. The cubic root of 90605801 is about 449.1437231180.

The spelling of 90605801 in words is "ninety million, six hundred five thousand, eight hundred one".