138786193 has 8 divisors (see below), whose sum is σ = 170813888. Its totient is φ = 109808784.

The previous prime is 138786191. The next prime is 138786233. The reversal of 138786193 is 391687831.

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

It is a cyclic number.

It is not a de Polignac number, because 138786193 - 2¹ = 138786191 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138786191) 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, 762471 + ... + 762652.

It is an arithmetic number, because the mean of its divisors is an integer number (21351736).

Almost surely, 2^138786193 is an apocalyptic number.

138786193 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

138786193 is a deficient number, since it is larger than the sum of its proper divisors (32027695).

138786193 is a wasteful number, since it uses less digits than its factorization.

138786193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1525143.

The product of its digits is 217728, while the sum is 46.

The square root of 138786193 is about 11780.7551965059. The cubic root of 138786193 is about 517.7444128516.

The spelling of 138786193 in words is "one hundred thirty-eight million, seven hundred eighty-six thousand, one hundred ninety-three".