139660994 has 16 divisors (see below), whose sum is σ = 230562720. Its totient is φ = 62919360.

The previous prime is 139660993. The next prime is 139661009. The reversal of 139660994 is 499066931.

It is not an unprimeable number, because it can be changed into a prime (139660993) 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, 25604 + ... + 30575.

It is an arithmetic number, because the mean of its divisors is an integer number (14410170).

Almost surely, 2^139660994 is an apocalyptic number.

139660994 is a deficient number, since it is larger than the sum of its proper divisors (90901726).

139660994 is a wasteful number, since it uses less digits than its factorization.

139660994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56305.

The product of its (nonzero) digits is 314928, while the sum is 47.

The square root of 139660994 is about 11817.8252652508. The cubic root of 139660994 is about 518.8299555666.

The spelling of 139660994 in words is "one hundred thirty-nine million, six hundred sixty thousand, nine hundred ninety-four".