194679649 has 2 divisors, whose sum is σ = 194679650. Its totient is φ = 194679648.

The previous prime is 194679637. The next prime is 194679713. The reversal of 194679649 is 946976491.

It is a happy number.

194679649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109579024 + 85100625 = 10468^2 + 9225^2 .

It is a cyclic number.

It is not a de Polignac number, because 194679649 - 2¹³ = 194671457 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 194679649.

It is not a weakly prime, because it can be changed into another prime (194679629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97339824 + 97339825.

It is an arithmetic number, because the mean of its divisors is an integer number (97339825).

Almost surely, 2^194679649 is an apocalyptic number.

It is an amenable number.

194679649 is a deficient number, since it is larger than the sum of its proper divisors (1).

194679649 is an equidigital number, since it uses as much as digits as its factorization.

194679649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2939328, while the sum is 55.

The square root of 194679649 is about 13952.7649231255. The cubic root of 194679649 is about 579.5712735391.

The spelling of 194679649 in words is "one hundred ninety-four million, six hundred seventy-nine thousand, six hundred forty-nine".