690617 has 6 divisors (see below), whose sum is σ = 705594. Its totient is φ = 675920.

The previous prime is 690611. The next prime is 690629. The reversal of 690617 is 716096.

It is a happy number.

690617 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 609961 + 80656 = 781^2 + 284^2 .

It is not a de Polignac number, because 690617 - 2⁶ = 690553 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 690617.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690611) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4973 + ... + 5109.

It is an arithmetic number, because the mean of its divisors is an integer number (117599).

2⁶⁹⁰⁶¹⁷ is an apocalyptic number.

It is an amenable number.

690617 is a deficient number, since it is larger than the sum of its proper divisors (14977).

690617 is an equidigital number, since it uses as much as digits as its factorization.

690617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 690617 is about 831.0336936611. The cubic root of 690617 is about 88.3918902902.

The spelling of 690617 in words is "six hundred ninety thousand, six hundred seventeen".