169939 has 8 divisors (see below), whose sum is σ = 211968. Its totient is φ = 132360.

The previous prime is 169937. The next prime is 169943. The reversal of 169939 is 939961.

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

It is a cyclic number.

It is not a de Polignac number, because 169939 - 2¹ = 169937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 169898 and 169907.

It is not an unprimeable number, because it can be changed into a prime (169933) 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, 1027 + ... + 1180.

It is an arithmetic number, because the mean of its divisors is an integer number (26496).

2¹⁶⁹⁹³⁹ is an apocalyptic number.

169939 is a deficient number, since it is larger than the sum of its proper divisors (42029).

169939 is a wasteful number, since it uses less digits than its factorization.

169939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2225.

The product of its digits is 13122, while the sum is 37.

The square root of 169939 is about 412.2365825591. The cubic root of 169939 is about 55.3899559091.

The spelling of 169939 in words is "one hundred sixty-nine thousand, nine hundred thirty-nine".