194290812139 has 2 divisors, whose sum is σ = 194290812140. Its totient is φ = 194290812138.

The previous prime is 194290812119. The next prime is 194290812173. The reversal of 194290812139 is 931218092491.

194290812139 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 a de Polignac number, because none of the positive numbers 2^k-194290812139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 194290812092 and 194290812101.

It is not a weakly prime, because it can be changed into another prime (194290812119) 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, 97145406069 + 97145406070.

It is an arithmetic number, because the mean of its divisors is an integer number (97145406070).

Almost surely, 2^194290812139 is an apocalyptic number.

194290812139 is a deficient number, since it is larger than the sum of its proper divisors (1).

194290812139 is an equidigital number, since it uses as much as digits as its factorization.

194290812139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 49.

The spelling of 194290812139 in words is "one hundred ninety-four billion, two hundred ninety million, eight hundred twelve thousand, one hundred thirty-nine".