191478211843 has 2 divisors, whose sum is σ = 191478211844. Its totient is φ = 191478211842.

The previous prime is 191478211831. The next prime is 191478211861. The reversal of 191478211843 is 348112874191.

191478211843 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 191478211843 - 2¹⁷ = 191478080771 is a prime.

It is a super-2 number, since 2×191478211843² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (191478211543) 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, 95739105921 + 95739105922.

It is an arithmetic number, because the mean of its divisors is an integer number (95739105922).

Almost surely, 2^191478211843 is an apocalyptic number.

191478211843 is a deficient number, since it is larger than the sum of its proper divisors (1).

191478211843 is an equidigital number, since it uses as much as digits as its factorization.

191478211843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 387072, while the sum is 49.

The spelling of 191478211843 in words is "one hundred ninety-one billion, four hundred seventy-eight million, two hundred eleven thousand, eight hundred forty-three".