690289 has 8 divisors (see below), whose sum is σ = 743040. Its totient is φ = 639216.

The previous prime is 690281. The next prime is 690293. The reversal of 690289 is 982096.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 690289 - 2³ = 690281 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (690281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 507 + ... + 1279.

It is an arithmetic number, because the mean of its divisors is an integer number (92880).

2⁶⁹⁰²⁸⁹ is an apocalyptic number.

It is an amenable number.

690289 is a deficient number, since it is larger than the sum of its proper divisors (52751).

690289 is a wasteful number, since it uses less digits than its factorization.

690289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 690289 is about 830.8363256382. The cubic root of 690289 is about 88.3778945294.

It can be divided in two parts, 690 and 289, that added together give a palindrome (979).

The spelling of 690289 in words is "six hundred ninety thousand, two hundred eighty-nine".