139846171 has 4 divisors (see below), whose sum is σ = 142484832. Its totient is φ = 137207512.

The previous prime is 139846169. The next prime is 139846193. The reversal of 139846171 is 171648931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 171648931 = 23 ⋅7462997.

It is a cyclic number.

It is not a de Polignac number, because 139846171 - 2¹ = 139846169 is a prime.

It is a super-2 number, since 2×139846171² = 39113903086722482, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139846151) 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, 1319251 + ... + 1319356.

It is an arithmetic number, because the mean of its divisors is an integer number (35621208).

Almost surely, 2^139846171 is an apocalyptic number.

139846171 is a deficient number, since it is larger than the sum of its proper divisors (2638661).

139846171 is an equidigital number, since it uses as much as digits as its factorization.

139846171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2638660.

The product of its digits is 36288, while the sum is 40.

The square root of 139846171 is about 11825.6573178830. The cubic root of 139846171 is about 519.0591604456.

The spelling of 139846171 in words is "one hundred thirty-nine million, eight hundred forty-six thousand, one hundred seventy-one".