194289913 has 2 divisors, whose sum is σ = 194289914. Its totient is φ = 194289912.

The previous prime is 194289859. The next prime is 194289919. The reversal of 194289913 is 319982491.

It is a happy number.

194289913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112423609 + 81866304 = 10603^2 + 9048^2 .

It is a cyclic number.

It is not a de Polignac number, because 194289913 - 2⁹ = 194289401 is a prime.

It is not a weakly prime, because it can be changed into another prime (194289919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97144956 + 97144957.

It is an arithmetic number, because the mean of its divisors is an integer number (97144957).

Almost surely, 2^194289913 is an apocalyptic number.

It is an amenable number.

194289913 is a deficient number, since it is larger than the sum of its proper divisors (1).

194289913 is an equidigital number, since it uses as much as digits as its factorization.

194289913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 46.

The square root of 194289913 is about 13938.7916621205. The cubic root of 194289913 is about 579.1842604964.

The spelling of 194289913 in words is "one hundred ninety-four million, two hundred eighty-nine thousand, nine hundred thirteen".