169957 has 2 divisors, whose sum is σ = 169958. Its totient is φ = 169956.

The previous prime is 169951. The next prime is 169987. The reversal of 169957 is 759961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86436 + 83521 = 294^2 + 289^2 .

It is an emirp because it is prime and its reverse (759961) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-169957 is a prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another 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 as a sum of consecutive naturals, namely, 84978 + 84979.

It is an arithmetic number, because the mean of its divisors is an integer number (84979).

2¹⁶⁹⁹⁵⁷ is an apocalyptic number.

It is an amenable number.

169957 is a deficient number, since it is larger than the sum of its proper divisors (1).

169957 is an equidigital number, since it uses as much as digits as its factorization.

169957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17010, while the sum is 37.

The square root of 169957 is about 412.2584141046. The cubic root of 169957 is about 55.3919114814.

The spelling of 169957 in words is "one hundred sixty-nine thousand, nine hundred fifty-seven".