194158133 has 8 divisors (see below), whose sum is σ = 213039288. Its totient is φ = 175840704.

The previous prime is 194158121. The next prime is 194158141. The reversal of 194158133 is 331851491.

It can be written as a sum of positive squares in 4 ways, for example, as 10745284 + 183412849 = 3278^2 + 13543^2 .

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

It is not a de Polignac number, because 194158133 - 2⁴ = 194158117 is a prime.

It is a super-2 number, since 2×194158133² = 75394761220091378, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 194158093 and 194158102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194158183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140210 + ... + 141587.

It is an arithmetic number, because the mean of its divisors is an integer number (26629911).

Almost surely, 2^194158133 is an apocalyptic number.

194158133 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

194158133 is a deficient number, since it is larger than the sum of its proper divisors (18881155).

194158133 is a wasteful number, since it uses less digits than its factorization.

194158133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281863.

The product of its digits is 12960, while the sum is 35.

The square root of 194158133 is about 13934.0637647457. The cubic root of 194158133 is about 579.0532841231.

The spelling of 194158133 in words is "one hundred ninety-four million, one hundred fifty-eight thousand, one hundred thirty-three".