194139057 has 16 divisors (see below), whose sum is σ = 296680320. Its totient is φ = 110618112.

The previous prime is 194139013. The next prime is 194139073. The reversal of 194139057 is 750931491.

It is a happy number.

194139057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 194139057 - 2⁸ = 194138801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (194139157) 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, 5682 + ... + 20507.

It is an arithmetic number, because the mean of its divisors is an integer number (18542520).

Almost surely, 2^194139057 is an apocalyptic number.

It is an amenable number.

194139057 is a deficient number, since it is larger than the sum of its proper divisors (102541263).

194139057 is a wasteful number, since it uses less digits than its factorization.

194139057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26552.

The product of its (nonzero) digits is 34020, while the sum is 39.

The square root of 194139057 is about 13933.3792383614. The cubic root of 194139057 is about 579.0343195433.

The spelling of 194139057 in words is "one hundred ninety-four million, one hundred thirty-nine thousand, fifty-seven".