391000192019 has 2 divisors, whose sum is σ = 391000192020. Its totient is φ = 391000192018.

The previous prime is 391000191991. The next prime is 391000192043. The reversal of 391000192019 is 910291000193.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-391000192019 is a prime.

It is a super-2 number, since 2×391000192019² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 391000192019.

It is not a weakly prime, because it can be changed into another prime (391000192819) 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, 195500096009 + 195500096010.

It is an arithmetic number, because the mean of its divisors is an integer number (195500096010).

Almost surely, 2^391000192019 is an apocalyptic number.

391000192019 is a deficient number, since it is larger than the sum of its proper divisors (1).

391000192019 is an equidigital number, since it uses as much as digits as its factorization.

391000192019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4374, while the sum is 35.

The spelling of 391000192019 in words is "three hundred ninety-one billion, one hundred ninety-two thousand, nineteen".