194774653 has 2 divisors, whose sum is σ = 194774654. Its totient is φ = 194774652.

The previous prime is 194774651. The next prime is 194774659. The reversal of 194774653 is 356477491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190522809 + 4251844 = 13803^2 + 2062^2 .

It is a cyclic number.

It is not a de Polignac number, because 194774653 - 2¹ = 194774651 is a prime.

Together with 194774651, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194774651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97387326 + 97387327.

It is an arithmetic number, because the mean of its divisors is an integer number (97387327).

Almost surely, 2^194774653 is an apocalyptic number.

It is an amenable number.

194774653 is a deficient number, since it is larger than the sum of its proper divisors (1).

194774653 is an equidigital number, since it uses as much as digits as its factorization.

194774653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 635040, while the sum is 46.

The square root of 194774653 is about 13956.1689943910. The cubic root of 194774653 is about 579.6655354634.

The spelling of 194774653 in words is "one hundred ninety-four million, seven hundred seventy-four thousand, six hundred fifty-three".