193139142 has 128 divisors (see below), whose sum is σ = 514252800. Its totient is φ = 46987776.

The previous prime is 193139137. The next prime is 193139143. The reversal of 193139142 is 241931391.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (193139143) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 311709 + ... + 312327.

It is an arithmetic number, because the mean of its divisors is an integer number (4017600).

Almost surely, 2^193139142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 193139142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (257126400).

193139142 is an abundant number, since it is smaller than the sum of its proper divisors (321113658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

193139142 is a wasteful number, since it uses less digits than its factorization.

193139142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690.

The product of its digits is 5832, while the sum is 33.

The square root of 193139142 is about 13897.4509173445. The cubic root of 193139142 is about 578.0385007260.

The spelling of 193139142 in words is "one hundred ninety-three million, one hundred thirty-nine thousand, one hundred forty-two".