139645166 has 8 divisors (see below), whose sum is σ = 214339224. Its totient is φ = 68198760.

The previous prime is 139645151. The next prime is 139645169. The reversal of 139645166 is 661546931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139645169) by changing a digit.

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, 811805 + ... + 811976.

It is an arithmetic number, because the mean of its divisors is an integer number (26792403).

Almost surely, 2^139645166 is an apocalyptic number.

139645166 is a deficient number, since it is larger than the sum of its proper divisors (74694058).

139645166 is a wasteful number, since it uses less digits than its factorization.

139645166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1623826.

The product of its digits is 116640, while the sum is 41.

The square root of 139645166 is about 11817.1555799185. The cubic root of 139645166 is about 518.8103548879.

The spelling of 139645166 in words is "one hundred thirty-nine million, six hundred forty-five thousand, one hundred sixty-six".