690172 has 18 divisors (see below), whose sum is σ = 1389192. Its totient is φ = 293904.

The previous prime is 690163. The next prime is 690187. The reversal of 690172 is 271096.

It is a congruent number.

It is an unprimeable number.

690172 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4318 + ... + 4474.

2⁶⁹⁰¹⁷² is an apocalyptic number.

It is an amenable number.

690172 is an abundant number, since it is smaller than the sum of its proper divisors (699020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

690172 is a wasteful number, since it uses less digits than its factorization.

690172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325 (or 166 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 690172 is about 830.7659116743. The cubic root of 690172 is about 88.3729010663.

The spelling of 690172 in words is "six hundred ninety thousand, one hundred seventy-two".