139413668 has 24 divisors (see below), whose sum is σ = 258770232. Its totient is φ = 65493504.

The previous prime is 139413661. The next prime is 139413671. The reversal of 139413668 is 866314931.

It can be written as a sum of positive squares in 4 ways, for example, as 96668224 + 42745444 = 9832^2 + 6538^2 .

It is not an unprimeable number, because it can be changed into a prime (139413661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48446 + ... + 51242.

It is an arithmetic number, because the mean of its divisors is an integer number (10782093).

Almost surely, 2^139413668 is an apocalyptic number.

It is an amenable number.

139413668 is a deficient number, since it is larger than the sum of its proper divisors (119356564).

139413668 is a wasteful number, since it uses less digits than its factorization.

139413668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3551 (or 3549 counting only the distinct ones).

The product of its digits is 93312, while the sum is 41.

The square root of 139413668 is about 11807.3565204071. The cubic root of 139413668 is about 518.5235088487.

The spelling of 139413668 in words is "one hundred thirty-nine million, four hundred thirteen thousand, six hundred sixty-eight".