690189 has 4 divisors (see below), whose sum is σ = 920256. Its totient is φ = 460124.

The previous prime is 690187. The next prime is 690233. The reversal of 690189 is 981096.

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 a cyclic number.

It is not a de Polignac number, because 690189 - 2¹ = 690187 is a prime.

It is a D-number.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690187) 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, 115029 + ... + 115034.

It is an arithmetic number, because the mean of its divisors is an integer number (230064).

2⁶⁹⁰¹⁸⁹ is an apocalyptic number.

It is an amenable number.

690189 is a deficient number, since it is larger than the sum of its proper divisors (230067).

690189 is a wasteful number, since it uses less digits than its factorization.

690189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230066.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 690189 is about 830.7761431336. The cubic root of 690189 is about 88.3736266472.

The spelling of 690189 in words is "six hundred ninety thousand, one hundred eighty-nine".