3312891991 has 2 divisors, whose sum is σ = 3312891992. Its totient is φ = 3312891990.

The previous prime is 3312891979. The next prime is 3312892001. The reversal of 3312891991 is 1991982133.

It is a strong prime.

It is an emirp because it is prime and its reverse (1991982133) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3312891991 - 2²³ = 3304503383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3312891971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1656445995 + 1656445996.

It is an arithmetic number, because the mean of its divisors is an integer number (1656445996).

Almost surely, 2^3312891991 is an apocalyptic number.

3312891991 is a deficient number, since it is larger than the sum of its proper divisors (1).

3312891991 is an equidigital number, since it uses as much as digits as its factorization.

3312891991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104976, while the sum is 46.

The square root of 3312891991 is about 57557.7274655628. The cubic root of 3312891991 is about 1490.7417880541.

The spelling of 3312891991 in words is "three billion, three hundred twelve million, eight hundred ninety-one thousand, nine hundred ninety-one".