397289 has 2 divisors, whose sum is σ = 397290. Its totient is φ = 397288.

The previous prime is 397283. The next prime is 397297. The reversal of 397289 is 982793.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 354025 + 43264 = 595^2 + 208^2 .

It is a cyclic number.

It is not a de Polignac number, because 397289 - 2¹⁶ = 331753 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (397283) 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 as a sum of consecutive naturals, namely, 198644 + 198645.

It is an arithmetic number, because the mean of its divisors is an integer number (198645).

2³⁹⁷²⁸⁹ is an apocalyptic number.

It is an amenable number.

397289 is a deficient number, since it is larger than the sum of its proper divisors (1).

397289 is an equidigital number, since it uses as much as digits as its factorization.

397289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 38.

The square root of 397289 is about 630.3086545495. The cubic root of 397289 is about 73.5137956735.

Subtracting from 397289 its product of digits (27216), we obtain a palindrome (370073).

It can be divided in two parts, 397 and 289, that added together give a palindrome (686).

The spelling of 397289 in words is "three hundred ninety-seven thousand, two hundred eighty-nine".