169997 has 4 divisors (see below), whose sum is σ = 171360. Its totient is φ = 168636.

The previous prime is 169991. The next prime is 170003. The reversal of 169997 is 799961.

It is a happy number.

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 an interprime number because it is at equal distance from previous prime (169991) and next prime (170003).

It is a cyclic number.

It is not a de Polignac number, because 169997 - 2⁶ = 169933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (169991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 473 + ... + 750.

It is an arithmetic number, because the mean of its divisors is an integer number (42840).

2¹⁶⁹⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

169997 is a deficient number, since it is larger than the sum of its proper divisors (1363).

169997 is a wasteful number, since it uses less digits than its factorization.

169997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1362.

The product of its digits is 30618, while the sum is 41.

The square root of 169997 is about 412.3069245113. The cubic root of 169997 is about 55.3962567034.

The spelling of 169997 in words is "one hundred sixty-nine thousand, nine hundred ninety-seven".