90205093 has 4 divisors (see below), whose sum is σ = 98405568. Its totient is φ = 82004620.

The previous prime is 90205069. The next prime is 90205121. The reversal of 90205093 is 39050209.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 90205093 - 2²¹ = 88107941 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 (90205693) 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 3 ways as a sum of consecutive naturals, for example, 4100221 + ... + 4100242.

It is an arithmetic number, because the mean of its divisors is an integer number (24601392).

Almost surely, 2^90205093 is an apocalyptic number.

It is an amenable number.

90205093 is a deficient number, since it is larger than the sum of its proper divisors (8200475).

90205093 is a wasteful number, since it uses less digits than its factorization.

90205093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8200474.

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 90205093 is about 9497.6361795975. The cubic root of 90205093 is about 448.4806255708.

The spelling of 90205093 in words is "ninety million, two hundred five thousand, ninety-three".