690343 has 4 divisors (see below), whose sum is σ = 695520. Its totient is φ = 685168.

The previous prime is 690341. The next prime is 690367. The reversal of 690343 is 343096.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 690343 - 2¹ = 690341 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2383 + ... + 2656.

It is an arithmetic number, because the mean of its divisors is an integer number (173880).

2⁶⁹⁰³⁴³ is an apocalyptic number.

690343 is a deficient number, since it is larger than the sum of its proper divisors (5177).

690343 is a wasteful number, since it uses less digits than its factorization.

690343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5176.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 690343 is about 830.8688223781. The cubic root of 690343 is about 88.3801990143.

The spelling of 690343 in words is "six hundred ninety thousand, three hundred forty-three".