139378 has 8 divisors (see below), whose sum is σ = 210672. Its totient is φ = 69156.

The previous prime is 139369. The next prime is 139387. The reversal of 139378 is 873931.

It is an interprime number because it is at equal distance from previous prime (139369) and next prime (139387).

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

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301 + ... + 607.

It is an arithmetic number, because the mean of its divisors is an integer number (26334).

2¹³⁹³⁷⁸ is an apocalyptic number.

139378 is a deficient number, since it is larger than the sum of its proper divisors (71294).

139378 is a wasteful number, since it uses less digits than its factorization.

139378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536.

The product of its digits is 4536, while the sum is 31.

The square root of 139378 is about 373.3336309523. Note that the first 3 decimals coincide. The cubic root of 139378 is about 51.8479284887.

The spelling of 139378 in words is "one hundred thirty-nine thousand, three hundred seventy-eight".