213659 has 2 divisors, whose sum is σ = 213660. Its totient is φ = 213658.

The previous prime is 213649. The next prime is 213713. The reversal of 213659 is 956312.

213659 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213659 - 2¹² = 209563 is a prime.

It is not a weakly prime, because it can be changed into another prime (213649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106829 + 106830.

It is an arithmetic number, because the mean of its divisors is an integer number (106830).

2²¹³⁶⁵⁹ is an apocalyptic number.

213659 is a deficient number, since it is larger than the sum of its proper divisors (1).

213659 is an equidigital number, since it uses as much as digits as its factorization.

213659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1620, while the sum is 26.

The square root of 213659 is about 462.2326254171. The cubic root of 213659 is about 59.7824529152.

The spelling of 213659 in words is "two hundred thirteen thousand, six hundred fifty-nine".