8119091213 has 2 divisors, whose sum is σ = 8119091214. Its totient is φ = 8119091212.

The previous prime is 8119091209. The next prime is 8119091273. The reversal of 8119091213 is 3121909118.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7220410729 + 898680484 = 84973^2 + 29978^2 .

It is a cyclic number.

It is not a de Polignac number, because 8119091213 - 2² = 8119091209 is a prime.

It is a super-2 number, since 2×8119091213² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8119091273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4059545606 + 4059545607.

It is an arithmetic number, because the mean of its divisors is an integer number (4059545607).

Almost surely, 2^8119091213 is an apocalyptic number.

It is an amenable number.

8119091213 is a deficient number, since it is larger than the sum of its proper divisors (1).

8119091213 is an equidigital number, since it uses as much as digits as its factorization.

8119091213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 35.

The square root of 8119091213 is about 90105.9998723725. Note that the first 3 decimals coincide. The cubic root of 8119091213 is about 2009.8754254782.

The spelling of 8119091213 in words is "eight billion, one hundred nineteen million, ninety-one thousand, two hundred thirteen".