213897 has 16 divisors (see below), whose sum is σ = 306432. Its totient is φ = 132480.

The previous prime is 213887. The next prime is 213901. The reversal of 213897 is 798312.

It is a happy number.

It is not a de Polignac number, because 213897 - 2⁴ = 213881 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 213897.

It is not an unprimeable number, because it can be changed into a prime (213827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4528 + ... + 4574.

It is an arithmetic number, because the mean of its divisors is an integer number (19152).

2²¹³⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

213897 is a deficient number, since it is larger than the sum of its proper divisors (92535).

213897 is a wasteful number, since it uses less digits than its factorization.

213897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128.

The product of its digits is 3024, while the sum is 30.

The square root of 213897 is about 462.4899998919. The cubic root of 213897 is about 59.8046423915.

The spelling of 213897 in words is "two hundred thirteen thousand, eight hundred ninety-seven".