139189808 has 20 divisors (see below), whose sum is σ = 271653000. Its totient is φ = 69085824.

The previous prime is 139189789. The next prime is 139189811. The reversal of 139189808 is 808981931.

It is a happy number.

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, 29558 + ... + 33941.

It is an arithmetic number, because the mean of its divisors is an integer number (13582650).

Almost surely, 2^139189808 is an apocalyptic number.

It is an amenable number.

139189808 is a deficient number, since it is larger than the sum of its proper divisors (132463192).

139189808 is a wasteful number, since it uses less digits than its factorization.

139189808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63644 (or 63638 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 47.

The square root of 139189808 is about 11797.8730286438. The cubic root of 139189808 is about 518.2458247954.

The spelling of 139189808 in words is "one hundred thirty-nine million, one hundred eighty-nine thousand, eight hundred eight".