811911379 has 2 divisors, whose sum is σ = 811911380. Its totient is φ = 811911378.

The previous prime is 811911377. The next prime is 811911391. The reversal of 811911379 is 973119118.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 811911379 - 2¹ = 811911377 is a prime.

It is a super-6 number, since 6×811911379⁶ (a number of 55 digits) contains 666666 as substring.

Together with 811911377, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (811911377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405955689 + 405955690.

It is an arithmetic number, because the mean of its divisors is an integer number (405955690).

Almost surely, 2^811911379 is an apocalyptic number.

811911379 is a deficient number, since it is larger than the sum of its proper divisors (1).

811911379 is an equidigital number, since it uses as much as digits as its factorization.

811911379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 40.

The square root of 811911379 is about 28494.0586614122. The cubic root of 811911379 is about 932.9023979002.

The spelling of 811911379 in words is "eight hundred eleven million, nine hundred eleven thousand, three hundred seventy-nine".