194935939 has 4 divisors (see below), whose sum is σ = 212657400. Its totient is φ = 177214480.

The previous prime is 194935921. The next prime is 194935969. The reversal of 194935939 is 939539491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 939539491 = 11 ⋅85412681.

It is a cyclic number.

It is not a de Polignac number, because 194935939 - 2⁵ = 194935907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194935969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8860714 + ... + 8860735.

It is an arithmetic number, because the mean of its divisors is an integer number (53164350).

Almost surely, 2^194935939 is an apocalyptic number.

194935939 is a deficient number, since it is larger than the sum of its proper divisors (17721461).

194935939 is a wasteful number, since it uses less digits than its factorization.

194935939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17721460.

The product of its digits is 1180980, while the sum is 52.

The square root of 194935939 is about 13961.9461036060. The cubic root of 194935939 is about 579.8254914950.

The spelling of 194935939 in words is "one hundred ninety-four million, nine hundred thirty-five thousand, nine hundred thirty-nine".