138719 has 12 divisors (see below), whose sum is σ = 171000. Its totient is φ = 111888.

The previous prime is 138683. The next prime is 138727. The reversal of 138719 is 917831.

It is a de Polignac number, because none of the positive numbers 2^k-138719 is a prime.

It is a super-2 number, since 2×138719² = 38485921922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 138691 and 138700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138739) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 857 + ... + 1005.

It is an arithmetic number, because the mean of its divisors is an integer number (14250).

2¹³⁸⁷¹⁹ is an apocalyptic number.

138719 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

138719 is a deficient number, since it is larger than the sum of its proper divisors (32281).

138719 is a wasteful number, since it uses less digits than its factorization.

138719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182 (or 175 counting only the distinct ones).

The product of its digits is 1512, while the sum is 29.

The square root of 138719 is about 372.4499966438. The cubic root of 138719 is about 51.7660844462.

The spelling of 138719 in words is "one hundred thirty-eight thousand, seven hundred nineteen".