690212213 has 4 divisors (see below), whose sum is σ = 690614988. Its totient is φ = 689809440.

The previous prime is 690212207. The next prime is 690212227. The reversal of 690212213 is 312212096.

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

It can be written as a sum of positive squares in 2 ways, for example, as 308283364 + 381928849 = 17558^2 + 19543^2 .

It is a cyclic number.

It is not a de Polignac number, because 690212213 - 2¹⁴ = 690195829 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690212293) 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, 198806 + ... + 202247.

It is an arithmetic number, because the mean of its divisors is an integer number (172653747).

Almost surely, 2^690212213 is an apocalyptic number.

It is an amenable number.

690212213 is a deficient number, since it is larger than the sum of its proper divisors (402775).

690212213 is a wasteful number, since it uses less digits than its factorization.

690212213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402774.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 690212213 is about 26271.8901680104. The cubic root of 690212213 is about 883.7461738746.

The spelling of 690212213 in words is "six hundred ninety million, two hundred twelve thousand, two hundred thirteen".