397568853 has 36 divisors (see below), whose sum is σ = 635020204. Its totient is φ = 239500800.

The previous prime is 397568837. The next prime is 397568891. The reversal of 397568853 is 358865793.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 140351409 + 257217444 = 11847^2 + 16038^2 .

It is not a de Polignac number, because 397568853 - 2⁴ = 397568837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 397568853.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397568813) 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 in 35 ways as a sum of consecutive naturals, for example, 196101 + ... + 198117.

Almost surely, 2^397568853 is an apocalyptic number.

397568853 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

397568853 is a deficient number, since it is larger than the sum of its proper divisors (237451351).

397568853 is a wasteful number, since it uses less digits than its factorization.

397568853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2226 (or 2212 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 54.

The square root of 397568853 is about 19939.1286920969. The cubic root of 397568853 is about 735.3105282347.

The spelling of 397568853 in words is "three hundred ninety-seven million, five hundred sixty-eight thousand, eight hundred fifty-three".