690217 has 8 divisors (see below), whose sum is σ = 797472. Its totient is φ = 590400.

The previous prime is 690187. The next prime is 690233. The reversal of 690217 is 712096.

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 690217 - 2⁷ = 690089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 690191 and 690200.

It is not an unprimeable number, because it can be changed into a prime (690817) 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 7 ways as a sum of consecutive naturals, for example, 1659 + ... + 2032.

It is an arithmetic number, because the mean of its divisors is an integer number (99684).

2⁶⁹⁰²¹⁷ is an apocalyptic number.

It is an amenable number.

690217 is a deficient number, since it is larger than the sum of its proper divisors (107255).

690217 is a wasteful number, since it uses less digits than its factorization.

690217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3719.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 690217 is about 830.7929946744. The cubic root of 690217 is about 88.3748216958.

The spelling of 690217 in words is "six hundred ninety thousand, two hundred seventeen".