194719013 has 2 divisors, whose sum is σ = 194719014. Its totient is φ = 194719012.

The previous prime is 194718983. The next prime is 194719027. The reversal of 194719013 is 310917491.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113592964 + 81126049 = 10658^2 + 9007^2 .

It is a cyclic number.

It is not a de Polignac number, because 194719013 - 2⁶ = 194718949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194719313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97359506 + 97359507.

It is an arithmetic number, because the mean of its divisors is an integer number (97359507).

Almost surely, 2^194719013 is an apocalyptic number.

It is an amenable number.

194719013 is a deficient number, since it is larger than the sum of its proper divisors (1).

194719013 is an equidigital number, since it uses as much as digits as its factorization.

194719013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 194719013 is about 13954.1754682962. The cubic root of 194719013 is about 579.6103337871.

The spelling of 194719013 in words is "one hundred ninety-four million, seven hundred nineteen thousand, thirteen".