397849 has 2 divisors, whose sum is σ = 397850. Its totient is φ = 397848.

The previous prime is 397829. The next prime is 397867. The reversal of 397849 is 948793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 270400 + 127449 = 520^2 + 357^2 .

It is a cyclic number.

It is not a de Polignac number, because 397849 - 2⁷ = 397721 is a prime.

It is not a weakly prime, because it can be changed into another prime (397829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198924 + 198925.

It is an arithmetic number, because the mean of its divisors is an integer number (198925).

2³⁹⁷⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

397849 is a deficient number, since it is larger than the sum of its proper divisors (1).

397849 is an equidigital number, since it uses as much as digits as its factorization.

397849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 40.

The square root of 397849 is about 630.7527249248. The cubic root of 397849 is about 73.5483199938.

It can be divided in two parts, 39784 and 9, that added together give a palindrome (39793).

The spelling of 397849 in words is "three hundred ninety-seven thousand, eight hundred forty-nine".