169973 has 4 divisors (see below), whose sum is σ = 175488. Its totient is φ = 164460.

The previous prime is 169957. The next prime is 169987. The reversal of 169973 is 379961.

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: 379961 = 409 ⋅929.

It is a cyclic number.

It is not a de Polignac number, because 169973 - 2⁴ = 169957 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (169913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2711 + ... + 2772.

It is an arithmetic number, because the mean of its divisors is an integer number (43872).

2¹⁶⁹⁹⁷³ is an apocalyptic number.

It is an amenable number.

169973 is a deficient number, since it is larger than the sum of its proper divisors (5515).

169973 is an equidigital number, since it uses as much as digits as its factorization.

169973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5514.

The product of its digits is 10206, while the sum is 35.

The square root of 169973 is about 412.2778189522. The cubic root of 169973 is about 55.3936496520.

The spelling of 169973 in words is "one hundred sixty-nine thousand, nine hundred seventy-three".