397836213 has 4 divisors (see below), whose sum is σ = 530448288. Its totient is φ = 265224140.

The previous prime is 397836199. The next prime is 397836253. The reversal of 397836213 is 312638793.

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 397836213 - 2⁶ = 397836149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397836253) 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, 66306033 + ... + 66306038.

It is an arithmetic number, because the mean of its divisors is an integer number (132612072).

Almost surely, 2^397836213 is an apocalyptic number.

It is an amenable number.

397836213 is a deficient number, since it is larger than the sum of its proper divisors (132612075).

397836213 is a wasteful number, since it uses less digits than its factorization.

397836213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132612074.

The product of its digits is 163296, while the sum is 42.

The square root of 397836213 is about 19945.8319706148. The cubic root of 397836213 is about 735.4753202945.

The spelling of 397836213 in words is "three hundred ninety-seven million, eight hundred thirty-six thousand, two hundred thirteen".