194794489 has 2 divisors, whose sum is σ = 194794490. Its totient is φ = 194794488.

The previous prime is 194794447. The next prime is 194794507. The reversal of 194794489 is 984497491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136118889 + 58675600 = 11667^2 + 7660^2 .

It is a cyclic number.

It is not a de Polignac number, because 194794489 - 2⁷ = 194794361 is a prime.

It is a super-2 number, since 2×194794489² = 75889785889542242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (194792489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97397244 + 97397245.

It is an arithmetic number, because the mean of its divisors is an integer number (97397245).

Almost surely, 2^194794489 is an apocalyptic number.

It is an amenable number.

194794489 is a deficient number, since it is larger than the sum of its proper divisors (1).

194794489 is an equidigital number, since it uses as much as digits as its factorization.

194794489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2612736, while the sum is 55.

The square root of 194794489 is about 13956.8796297740. The cubic root of 194794489 is about 579.6852126563.

The spelling of 194794489 in words is "one hundred ninety-four million, seven hundred ninety-four thousand, four hundred eighty-nine".