139660173 has 16 divisors (see below), whose sum is σ = 211717440. Its totient is φ = 90940752.

The previous prime is 139660123. The next prime is 139660189. The reversal of 139660173 is 371066931.

It is not a de Polignac number, because 139660173 - 2⁶ = 139660109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139660123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58986 + ... + 61307.

It is an arithmetic number, because the mean of its divisors is an integer number (13232340).

Almost surely, 2^139660173 is an apocalyptic number.

It is an amenable number.

139660173 is a deficient number, since it is larger than the sum of its proper divisors (72057267).

139660173 is a wasteful number, since it uses less digits than its factorization.

139660173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120345 (or 120339 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 139660173 is about 11817.7905295364. The cubic root of 139660173 is about 518.8289389137.

The spelling of 139660173 in words is "one hundred thirty-nine million, six hundred sixty thousand, one hundred seventy-three".