169972 has 12 divisors (see below), whose sum is σ = 324576. Its totient is φ = 77240.

The previous prime is 169957. The next prime is 169987. The reversal of 169972 is 279961.

It is an interprime number because it is at equal distance from previous prime (169957) and next prime (169987).

It is a plaindrome in base 15.

It is a congruent number.

It is an unprimeable number.

169972 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 1888 + ... + 1975.

It is an arithmetic number, because the mean of its divisors is an integer number (27048).

2¹⁶⁹⁹⁷² is an apocalyptic number.

It is an amenable number.

169972 is a deficient number, since it is larger than the sum of its proper divisors (154604).

169972 is a wasteful number, since it uses less digits than its factorization.

169972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3878 (or 3876 counting only the distinct ones).

The product of its digits is 6804, while the sum is 34.

The square root of 169972 is about 412.2766061760. The cubic root of 169972 is about 55.3935410195.

It can be divided in two parts, 1699 and 72, that added together give a palindrome (1771).

The spelling of 169972 in words is "one hundred sixty-nine thousand, nine hundred seventy-two".