139871378 has 8 divisors (see below), whose sum is σ = 209886768. Its totient is φ = 69909124.

The previous prime is 139871371. The next prime is 139871387. The reversal of 139871378 is 873178931.

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

It is not an unprimeable number, because it can be changed into a prime (139871371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5876 + ... + 17727.

It is an arithmetic number, because the mean of its divisors is an integer number (26235846).

Almost surely, 2^139871378 is an apocalyptic number.

139871378 is a deficient number, since it is larger than the sum of its proper divisors (70015390).

139871378 is a wasteful number, since it uses less digits than its factorization.

139871378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26568.

The product of its digits is 254016, while the sum is 47.

The square root of 139871378 is about 11826.7230457130. The cubic root of 139871378 is about 519.0903450397.

The spelling of 139871378 in words is "one hundred thirty-nine million, eight hundred seventy-one thousand, three hundred seventy-eight".