690201 has 10 divisors (see below), whose sum is σ = 1031162. Its totient is φ = 460080.

The previous prime is 690187. The next prime is 690233. The reversal of 690201 is 102096.

It can be written as a sum of positive squares in only one way, i.e., 585225 + 104976 = 765^2 + 324^2 .

It is not a de Polignac number, because 690201 - 2⁷ = 690073 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690271) 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 9 ways as a sum of consecutive naturals, for example, 4180 + ... + 4341.

2⁶⁹⁰²⁰¹ is an apocalyptic number.

It is an amenable number.

690201 is a deficient number, since it is larger than the sum of its proper divisors (340961).

690201 is an equidigital number, since it uses as much as digits as its factorization.

690201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8533 (or 8524 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 690201 is about 830.7833652644. The cubic root of 690201 is about 88.3741388149.

Adding to 690201 its reverse (102096), we get a palindrome (792297).

The spelling of 690201 in words is "six hundred ninety thousand, two hundred one".