193695138 has 120 divisors (see below), whose sum is σ = 544007772. Its totient is φ = 51057216.

The previous prime is 193695113. The next prime is 193695149. The reversal of 193695138 is 831596391.

193695138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 190357209 + 3337929 = 13797^2 + 1827^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 193695093 and 193695102.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 102256 + ... + 104132.

Almost surely, 2^193695138 is an apocalyptic number.

193695138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 193695138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272003886).

193695138 is an abundant number, since it is smaller than the sum of its proper divisors (350312634).

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

193695138 is a wasteful number, since it uses less digits than its factorization.

193695138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1918 (or 1902 counting only the distinct ones).

The product of its digits is 174960, while the sum is 45.

The square root of 193695138 is about 13917.4400663340. The cubic root of 193695138 is about 578.5926421381.

The spelling of 193695138 in words is "one hundred ninety-three million, six hundred ninety-five thousand, one hundred thirty-eight".