690213 has 8 divisors (see below), whose sum is σ = 968800. Its totient is φ = 435888.

The previous prime is 690187. The next prime is 690233. The reversal of 690213 is 312096.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 690213 - 2⁸ = 689957 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

690213 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 690213.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 690213.

It is not an unprimeable number, because it can be changed into a prime (690233) 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, 5998 + ... + 6111.

It is an arithmetic number, because the mean of its divisors is an integer number (121100).

2⁶⁹⁰²¹³ is an apocalyptic number.

It is an amenable number.

690213 is a deficient number, since it is larger than the sum of its proper divisors (278587).

690213 is a wasteful number, since it uses less digits than its factorization.

690213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12131.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 690213 is about 830.7905873323. The cubic root of 690213 is about 88.3746509766.

It can be divided in two parts, 690 and 213, that added together give a triangular number (903 = T₄₂).

The spelling of 690213 in words is "six hundred ninety thousand, two hundred thirteen".