397044581 has 2 divisors, whose sum is σ = 397044582. Its totient is φ = 397044580.

The previous prime is 397044553. The next prime is 397044611. The reversal of 397044581 is 185440793.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216384100 + 180660481 = 14710^2 + 13441^2 .

It is a cyclic number.

It is not a de Polignac number, because 397044581 - 2⁶ = 397044517 is a prime.

It is a super-2 number, since 2×397044581² = 315288798602931122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397044541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198522290 + 198522291.

It is an arithmetic number, because the mean of its divisors is an integer number (198522291).

Almost surely, 2^397044581 is an apocalyptic number.

It is an amenable number.

397044581 is a deficient number, since it is larger than the sum of its proper divisors (1).

397044581 is an equidigital number, since it uses as much as digits as its factorization.

397044581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 397044581 is about 19925.9775418924. The cubic root of 397044581 is about 734.9871693196.

The spelling of 397044581 in words is "three hundred ninety-seven million, forty-four thousand, five hundred eighty-one".