3213019991 has 2 divisors, whose sum is σ = 3213019992. Its totient is φ = 3213019990.

The previous prime is 3213019963. The next prime is 3213019993. The reversal of 3213019991 is 1999103123.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3213019991 - 2¹⁰ = 3213018967 is a prime.

Together with 3213019993, 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 (3213019993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1606509995 + 1606509996.

It is an arithmetic number, because the mean of its divisors is an integer number (1606509996).

Almost surely, 2^3213019991 is an apocalyptic number.

3213019991 is a deficient number, since it is larger than the sum of its proper divisors (1).

3213019991 is an equidigital number, since it uses as much as digits as its factorization.

3213019991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13122, while the sum is 38.

The square root of 3213019991 is about 56683.5072221189. The cubic root of 3213019991 is about 1475.6084806931.

The spelling of 3213019991 in words is "three billion, two hundred thirteen million, nineteen thousand, nine hundred ninety-one".