690489 has 12 divisors (see below), whose sum is σ = 1056276. Its totient is φ = 433152.

The previous prime is 690467. The next prime is 690491. The reversal of 690489 is 984096.

It can be written as a sum of positive squares in 2 ways, for example, as 189225 + 501264 = 435^2 + 708^2 .

It is not a de Polignac number, because 690489 - 2⁸ = 690233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (690419) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2104 + ... + 2409.

It is an arithmetic number, because the mean of its divisors is an integer number (88023).

2⁶⁹⁰⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

690489 is a deficient number, since it is larger than the sum of its proper divisors (365787).

690489 is a wasteful number, since it uses less digits than its factorization.

690489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4536 (or 4533 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 690489 is about 830.9566775711. The cubic root of 690489 is about 88.3864290572.

The spelling of 690489 in words is "six hundred ninety thousand, four hundred eighty-nine".