3261996509 has 2 divisors, whose sum is σ = 3261996510. Its totient is φ = 3261996508.

The previous prime is 3261996427. The next prime is 3261996511. The reversal of 3261996509 is 9056991623.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3083025625 + 178970884 = 55525^2 + 13378^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3261996509 is a prime.

Together with 3261996511, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3261996599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1630998254 + 1630998255.

It is an arithmetic number, because the mean of its divisors is an integer number (1630998255).

Almost surely, 2^3261996509 is an apocalyptic number.

It is an amenable number.

3261996509 is a deficient number, since it is larger than the sum of its proper divisors (1).

3261996509 is an equidigital number, since it uses as much as digits as its factorization.

3261996509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 787320, while the sum is 50.

The square root of 3261996509 is about 57113.8906834406. The cubic root of 3261996509 is about 1483.0683404532.

The spelling of 3261996509 in words is "three billion, two hundred sixty-one million, nine hundred ninety-six thousand, five hundred nine".