169961 has 4 divisors (see below), whose sum is σ = 185424. Its totient is φ = 154500.

The previous prime is 169957. The next prime is 169987.

It is a happy number.

169961 is nontrivially palindromic in base 10.

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.

It is a cyclic number.

It is not a de Polignac number, because 169961 - 2² = 169957 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (169951) 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 3 ways as a sum of consecutive naturals, for example, 7715 + ... + 7736.

It is an arithmetic number, because the mean of its divisors is an integer number (46356).

2¹⁶⁹⁹⁶¹ is an apocalyptic number.

169961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

169961 is a deficient number, since it is larger than the sum of its proper divisors (15463).

169961 is a wasteful number, since it uses less digits than its factorization.

169961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15462.

The product of its digits is 2916, while the sum is 32.

The square root of 169961 is about 412.2632654021. The cubic root of 169961 is about 55.3923460343.

It can be divided in two parts, 169 and 961, that multiplied together give a square (162409 = 403²).

The spelling of 169961 in words is "one hundred sixty-nine thousand, nine hundred sixty-one".