139361668 has 12 divisors (see below), whose sum is σ = 243966492. Its totient is φ = 69656960.

The previous prime is 139361659. The next prime is 139361687. The reversal of 139361668 is 866163931.

It can be written as a sum of positive squares in 2 ways, for example, as 7387524 + 131974144 = 2718^2 + 11488^2 .

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 3 ways as a sum of consecutive naturals, for example, 16896 + ... + 23752.

It is an arithmetic number, because the mean of its divisors is an integer number (20330541).

Almost surely, 2^139361668 is an apocalyptic number.

It is an amenable number.

139361668 is a deficient number, since it is larger than the sum of its proper divisors (104604824).

139361668 is a wasteful number, since it uses less digits than its factorization.

139361668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11942 (or 11940 counting only the distinct ones).

The product of its digits is 139968, while the sum is 43.

The square root of 139361668 is about 11805.1542980175. The cubic root of 139361668 is about 518.4590326848.

The spelling of 139361668 in words is "one hundred thirty-nine million, three hundred sixty-one thousand, six hundred sixty-eight".