3311996861 has 2 divisors, whose sum is σ = 3311996862. Its totient is φ = 3311996860.

The previous prime is 3311996843. The next prime is 3311996867. The reversal of 3311996861 is 1686991133.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2787312025 + 524684836 = 52795^2 + 22906^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3311996861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3311996867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1655998430 + 1655998431.

It is an arithmetic number, because the mean of its divisors is an integer number (1655998431).

Almost surely, 2^3311996861 is an apocalyptic number.

It is an amenable number.

3311996861 is a deficient number, since it is larger than the sum of its proper divisors (1).

3311996861 is an equidigital number, since it uses as much as digits as its factorization.

3311996861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 47.

The square root of 3311996861 is about 57549.9510077984. The cubic root of 3311996861 is about 1490.6075118283.

The spelling of 3311996861 in words is "three billion, three hundred eleven million, nine hundred ninety-six thousand, eight hundred sixty-one".