2090434391 has 4 divisors (see below), whose sum is σ = 2090992800. Its totient is φ = 2089875984.

The previous prime is 2090434361. The next prime is 2090434417. The reversal of 2090434391 is 1934340902.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2090434391 - 2¹⁸ = 2090172247 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 (2090434301) 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, 273551 + ... + 281088.

It is an arithmetic number, because the mean of its divisors is an integer number (522748200).

Almost surely, 2^2090434391 is an apocalyptic number.

2090434391 is a deficient number, since it is larger than the sum of its proper divisors (558409).

2090434391 is an equidigital number, since it uses as much as digits as its factorization.

2090434391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558408.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 2090434391 is about 45721.2684754043. The cubic root of 2090434391 is about 1278.6318370730.

The spelling of 2090434391 in words is "two billion, ninety million, four hundred thirty-four thousand, three hundred ninety-one".