10687213 has 4 divisors (see below), whose sum is σ = 10696860. Its totient is φ = 10677568.

The previous prime is 10687211. The next prime is 10687217. The reversal of 10687213 is 31278601.

10687213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 7382089 + 3305124 = 2717^2 + 1818^2 .

It is a cyclic number.

It is not a de Polignac number, because 10687213 - 2¹ = 10687211 is a prime.

It is a super-2 number, since 2×10687213² = 228433043414738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10687211) 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, 2908 + ... + 5461.

It is an arithmetic number, because the mean of its divisors is an integer number (2674215).

Almost surely, 2^10687213 is an apocalyptic number.

It is an amenable number.

10687213 is a deficient number, since it is larger than the sum of its proper divisors (9647).

10687213 is an equidigital number, since it uses as much as digits as its factorization.

10687213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9646.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 10687213 is about 3269.1303124837. The cubic root of 10687213 is about 220.2697311443.

It can be divided in two parts, 1068 and 7213, that added together give a square (8281 = 91²).

The spelling of 10687213 in words is "ten million, six hundred eighty-seven thousand, two hundred thirteen".