139643706 has 16 divisors (see below), whose sum is σ = 279651744. Its totient is φ = 46487184.

The previous prime is 139643683. The next prime is 139643717. The reversal of 139643706 is 607346931.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10065 + ... + 19508.

It is an arithmetic number, because the mean of its divisors is an integer number (17478234).

Almost surely, 2^139643706 is an apocalyptic number.

139643706 is an abundant number, since it is smaller than the sum of its proper divisors (140008038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139643706 is a wasteful number, since it uses less digits than its factorization.

139643706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30365.

The product of its (nonzero) digits is 81648, while the sum is 39.

The square root of 139643706 is about 11817.0938051621. The cubic root of 139643706 is about 518.8085468154.

The spelling of 139643706 in words is "one hundred thirty-nine million, six hundred forty-three thousand, seven hundred six".