139671406 has 8 divisors (see below), whose sum is σ = 239436720. Its totient is φ = 59859168.

The previous prime is 139671403. The next prime is 139671407. The reversal of 139671406 is 604176931.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139671403) 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, 4988251 + ... + 4988278.

It is an arithmetic number, because the mean of its divisors is an integer number (29929590).

Almost surely, 2^139671406 is an apocalyptic number.

139671406 is a deficient number, since it is larger than the sum of its proper divisors (99765314).

139671406 is an equidigital number, since it uses as much as digits as its factorization.

139671406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9976538.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 139671406 is about 11818.2657780234. The cubic root of 139671406 is about 518.8428485085.

The spelling of 139671406 in words is "one hundred thirty-nine million, six hundred seventy-one thousand, four hundred six".