2590490921 has 4 divisors (see below), whose sum is σ = 2625977172. Its totient is φ = 2555004672.

The previous prime is 2590490909. The next prime is 2590490927. The reversal of 2590490921 is 1290940952.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 583898896 + 2006592025 = 24164^2 + 44795^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2590490921 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2590490927) 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, 17743016 + ... + 17743161.

It is an arithmetic number, because the mean of its divisors is an integer number (656494293).

Almost surely, 2^2590490921 is an apocalyptic number.

It is an amenable number.

2590490921 is a deficient number, since it is larger than the sum of its proper divisors (35486251).

2590490921 is an equidigital number, since it uses as much as digits as its factorization.

2590490921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35486250.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 2590490921 is about 50896.8655321720. The cubic root of 2590490921 is about 1373.3904553264.

The spelling of 2590490921 in words is "two billion, five hundred ninety million, four hundred ninety thousand, nine hundred twenty-one".