139170169 has 4 divisors (see below), whose sum is σ = 139273344. Its totient is φ = 139066996.

The previous prime is 139170151. The next prime is 139170179. The reversal of 139170169 is 961071931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 961071931 = 17 ⋅56533643.

It is a cyclic number.

It is not a de Polignac number, because 139170169 - 2⁵ = 139170137 is a prime.

It is a super-2 number, since 2×139170169² = 38736671878977122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139170139) 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, 49537 + ... + 52270.

It is an arithmetic number, because the mean of its divisors is an integer number (34818336).

Almost surely, 2^139170169 is an apocalyptic number.

It is an amenable number.

139170169 is a deficient number, since it is larger than the sum of its proper divisors (103175).

139170169 is a wasteful number, since it uses less digits than its factorization.

139170169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103174.

The product of its (nonzero) digits is 10206, while the sum is 37.

The square root of 139170169 is about 11797.0406882404. The cubic root of 139170169 is about 518.2214496666.

The spelling of 139170169 in words is "one hundred thirty-nine million, one hundred seventy thousand, one hundred sixty-nine".