139646847 has 16 divisors (see below), whose sum is σ = 194918400. Its totient is φ = 88821600.

The previous prime is 139646839. The next prime is 139646849. The reversal of 139646847 is 748646931.

It is not a de Polignac number, because 139646847 - 2³ = 139646839 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 139646796 and 139646805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139646849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3972 + ... + 17177.

It is an arithmetic number, because the mean of its divisors is an integer number (12182400).

Almost surely, 2^139646847 is an apocalyptic number.

139646847 is a deficient number, since it is larger than the sum of its proper divisors (55271553).

139646847 is a wasteful number, since it uses less digits than its factorization.

139646847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21254.

The product of its digits is 870912, while the sum is 48.

The square root of 139646847 is about 11817.2267051115. The cubic root of 139646847 is about 518.8124366325.

The spelling of 139646847 in words is "one hundred thirty-nine million, six hundred forty-six thousand, eight hundred forty-seven".