194426839 has 2 divisors, whose sum is σ = 194426840. Its totient is φ = 194426838.

The previous prime is 194426833. The next prime is 194426857. The reversal of 194426839 is 938624491.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 194426839 - 2⁷ = 194426711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194426833) 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, 97213419 + 97213420.

It is an arithmetic number, because the mean of its divisors is an integer number (97213420).

Almost surely, 2^194426839 is an apocalyptic number.

194426839 is a deficient number, since it is larger than the sum of its proper divisors (1).

194426839 is an equidigital number, since it uses as much as digits as its factorization.

194426839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 46.

The square root of 194426839 is about 13943.7024853516. The cubic root of 194426839 is about 579.3202887646.

The spelling of 194426839 in words is "one hundred ninety-four million, four hundred twenty-six thousand, eight hundred thirty-nine".