3131993911 has 2 divisors, whose sum is σ = 3131993912. Its totient is φ = 3131993910.

The previous prime is 3131993873. The next prime is 3131993923. The reversal of 3131993911 is 1193991313.

It is a strong prime.

It is an emirp because it is prime and its reverse (1193991313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3131993911 - 2⁷ = 3131993783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3131993951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1565996955 + 1565996956.

It is an arithmetic number, because the mean of its divisors is an integer number (1565996956).

Almost surely, 2^3131993911 is an apocalyptic number.

3131993911 is a deficient number, since it is larger than the sum of its proper divisors (1).

3131993911 is an equidigital number, since it uses as much as digits as its factorization.

3131993911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19683, while the sum is 40.

The square root of 3131993911 is about 55964.2199177296. The cubic root of 3131993911 is about 1463.0987401717.

The spelling of 3131993911 in words is "three billion, one hundred thirty-one million, nine hundred ninety-three thousand, nine hundred eleven".