210397 has 8 divisors (see below), whose sum is σ = 237312. Its totient is φ = 184800.

The previous prime is 210391. The next prime is 210401. The reversal of 210397 is 793012.

210397 is nontrivially palindromic in base 14.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-210397 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33 + ... + 649.

It is an arithmetic number, because the mean of its divisors is an integer number (29664).

2²¹⁰³⁹⁷ is an apocalyptic number.

It is an amenable number.

210397 is a deficient number, since it is larger than the sum of its proper divisors (26915).

210397 is a wasteful number, since it uses less digits than its factorization.

210397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659.

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 210397 is about 458.6905274801. The cubic root of 210397 is about 59.4766520922.

The spelling of 210397 in words is "two hundred ten thousand, three hundred ninety-seven".