2609434991 has 2 divisors, whose sum is σ = 2609434992. Its totient is φ = 2609434990.

The previous prime is 2609434987. The next prime is 2609435021. The reversal of 2609434991 is 1994349062.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2609434991 - 2² = 2609434987 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2609434921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1304717495 + 1304717496.

It is an arithmetic number, because the mean of its divisors is an integer number (1304717496).

Almost surely, 2^2609434991 is an apocalyptic number.

2609434991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2609434991 is an equidigital number, since it uses as much as digits as its factorization.

2609434991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 419904, while the sum is 47.

The square root of 2609434991 is about 51082.6290533289. The cubic root of 2609434991 is about 1376.7301620356.

The spelling of 2609434991 in words is "two billion, six hundred nine million, four hundred thirty-four thousand, nine hundred ninety-one".