213677 has 4 divisors (see below), whose sum is σ = 215196. Its totient is φ = 212160.

The previous prime is 213659. The next prime is 213713. The reversal of 213677 is 776312.

213677 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.

It can be written as a sum of positive squares in 2 ways, for example, as 48841 + 164836 = 221^2 + 406^2 .

It is a cyclic number.

It is not a de Polignac number, because 213677 - 2⁶ = 213613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213637) 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, 524 + ... + 837.

It is an arithmetic number, because the mean of its divisors is an integer number (53799).

2²¹³⁶⁷⁷ is an apocalyptic number.

It is an amenable number.

213677 is a deficient number, since it is larger than the sum of its proper divisors (1519).

213677 is a wasteful number, since it uses less digits than its factorization.

213677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1518.

The product of its digits is 1764, while the sum is 26.

The square root of 213677 is about 462.2520957227. The cubic root of 213677 is about 59.7841316867.

Adding to 213677 its reverse (776312), we get a palindrome (989989).

The spelling of 213677 in words is "two hundred thirteen thousand, six hundred seventy-seven".