2090557 has 4 divisors (see below), whose sum is σ = 2389216. Its totient is φ = 1791900.

The previous prime is 2090509. The next prime is 2090567. The reversal of 2090557 is 7550902.

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 a de Polignac number, because none of the positive numbers 2^k-2090557 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2090567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149319 + ... + 149332.

It is an arithmetic number, because the mean of its divisors is an integer number (597304).

2^2090557 is an apocalyptic number.

It is an amenable number.

2090557 is a deficient number, since it is larger than the sum of its proper divisors (298659).

2090557 is an equidigital number, since it uses as much as digits as its factorization.

2090557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298658.

The product of its (nonzero) digits is 3150, while the sum is 28.

The square root of 2090557 is about 1445.8758591248. The cubic root of 2090557 is about 127.8656834861.

The spelling of 2090557 in words is "two million, ninety thousand, five hundred fifty-seven".