397229 has 4 divisors (see below), whose sum is σ = 453984. Its totient is φ = 340476.

The previous prime is 397223. The next prime is 397237. The reversal of 397229 is 922793.

397229 = T₁₁₆ + T₁₁₇ + ... + T₁₅₇.

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, and also an emirpimes, since its reverse is a distinct semiprime: 922793 = 73 ⋅12641.

It is a cyclic number.

It is not a de Polignac number, because 397229 - 2¹⁶ = 331693 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 397195 and 397204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28367 + ... + 28380.

It is an arithmetic number, because the mean of its divisors is an integer number (113496).

2³⁹⁷²²⁹ is an apocalyptic number.

It is an amenable number.

397229 is a deficient number, since it is larger than the sum of its proper divisors (56755).

397229 is an equidigital number, since it uses as much as digits as its factorization.

397229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56754.

The product of its digits is 6804, while the sum is 32.

The square root of 397229 is about 630.2610570232. The cubic root of 397229 is about 73.5100947154.

It can be divided in two parts, 397 and 229, that added together give a palindrome (626).

The spelling of 397229 in words is "three hundred ninety-seven thousand, two hundred twenty-nine".