139138 has 8 divisors (see below), whose sum is σ = 211788. Its totient is φ = 68544.

The previous prime is 139133. The next prime is 139169. The reversal of 139138 is 831931.

It can be written as a sum of positive squares in 2 ways, for example, as 139129 + 9 = 373^2 + 3^2 .

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

It is a magnanimous number.

It is not an unprimeable number, because it can be changed into a prime (139133) by changing a digit.

139138 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 331 + ... + 622.

2¹³⁹¹³⁸ is an apocalyptic number.

139138 is a deficient number, since it is larger than the sum of its proper divisors (72650).

139138 is an equidigital number, since it uses as much as digits as its factorization.

139138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028.

The product of its digits is 648, while the sum is 25.

The square root of 139138 is about 373.0120641481. The cubic root of 139138 is about 51.8181517856.

The spelling of 139138 in words is "one hundred thirty-nine thousand, one hundred thirty-eight".