213797 has 4 divisors (see below), whose sum is σ = 217056. Its totient is φ = 210540.

The previous prime is 213791. The next prime is 213799. The reversal of 213797 is 797312.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 213797 - 2¹² = 209701 is a prime.

It is a Duffinian number.

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 213797.

It is not an unprimeable number, because it can be changed into a prime (213791) 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, 1529 + ... + 1662.

It is an arithmetic number, because the mean of its divisors is an integer number (54264).

2²¹³⁷⁹⁷ is an apocalyptic number.

It is an amenable number.

213797 is a deficient number, since it is larger than the sum of its proper divisors (3259).

213797 is an equidigital number, since it uses as much as digits as its factorization.

213797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3258.

The product of its digits is 2646, while the sum is 29.

The square root of 213797 is about 462.3818768075. The cubic root of 213797 is about 59.7953210882.

The spelling of 213797 in words is "two hundred thirteen thousand, seven hundred ninety-seven".