194935138 has 8 divisors (see below), whose sum is σ = 297196380. Its totient is φ = 95869680.

The previous prime is 194935133. The next prime is 194935157. The reversal of 194935138 is 831539491.

It can be written as a sum of positive squares in 2 ways, for example, as 154828249 + 40106889 = 12443^2 + 6333^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 194935094 and 194935103.

It is not an unprimeable number, because it can be changed into a prime (194935133) 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, 798793 + ... + 799036.

Almost surely, 2^194935138 is an apocalyptic number.

194935138 is a deficient number, since it is larger than the sum of its proper divisors (102261242).

194935138 is a wasteful number, since it uses less digits than its factorization.

194935138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1597892.

The product of its digits is 116640, while the sum is 43.

The square root of 194935138 is about 13961.9174184637. The cubic root of 194935138 is about 579.8246973181.

The spelling of 194935138 in words is "one hundred ninety-four million, nine hundred thirty-five thousand, one hundred thirty-eight".