194683661 has 16 divisors (see below), whose sum is σ = 210038400. Its totient is φ = 179995200.

The previous prime is 194683651. The next prime is 194683691. The reversal of 194683661 is 166386491.

It is a happy number.

194683661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 194683661 - 2¹⁸ = 194421517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194683651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98915 + ... + 100863.

It is an arithmetic number, because the mean of its divisors is an integer number (13127400).

Almost surely, 2^194683661 is an apocalyptic number.

It is an amenable number.

194683661 is a deficient number, since it is larger than the sum of its proper divisors (15354739).

194683661 is a wasteful number, since it uses less digits than its factorization.

194683661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2116.

The product of its digits is 186624, while the sum is 44.

The square root of 194683661 is about 13952.9086931722. The cubic root of 194683661 is about 579.5752548215.

The spelling of 194683661 in words is "one hundred ninety-four million, six hundred eighty-three thousand, six hundred sixty-one".