193871139 has 16 divisors (see below), whose sum is σ = 322279680. Its totient is φ = 100712160.

The previous prime is 193871113. The next prime is 193871143. The reversal of 193871139 is 931178391.

It is not a de Polignac number, because 193871139 - 2⁸ = 193870883 is a prime.

It is a super-3 number, since 3×193871139³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 193871139.

It is not an unprimeable number, because it can be changed into a prime (193871159) 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, 419404 + ... + 419865.

It is an arithmetic number, because the mean of its divisors is an integer number (20142480).

Almost surely, 2^193871139 is an apocalyptic number.

193871139 is a deficient number, since it is larger than the sum of its proper divisors (128408541).

193871139 is a wasteful number, since it uses less digits than its factorization.

193871139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839290.

The product of its digits is 40824, while the sum is 42.

The square root of 193871139 is about 13923.7616684573. The cubic root of 193871139 is about 578.7678350672.

The spelling of 193871139 in words is "one hundred ninety-three million, eight hundred seventy-one thousand, one hundred thirty-nine".