397663085 has 4 divisors (see below), whose sum is σ = 477195708. Its totient is φ = 318130464.

The previous prime is 397663073. The next prime is 397663111. The reversal of 397663085 is 580366793.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 182952676 + 214710409 = 13526^2 + 14653^2 .

It is a cyclic number.

It is not a de Polignac number, because 397663085 - 2¹⁶ = 397597549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39766304 + ... + 39766313.

It is an arithmetic number, because the mean of its divisors is an integer number (119298927).

Almost surely, 2^397663085 is an apocalyptic number.

It is an amenable number.

397663085 is a deficient number, since it is larger than the sum of its proper divisors (79532623).

397663085 is an equidigital number, since it uses as much as digits as its factorization.

397663085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79532622.

The product of its (nonzero) digits is 816480, while the sum is 47.

The square root of 397663085 is about 19941.4915440145. The cubic root of 397663085 is about 735.3686182213.

The spelling of 397663085 in words is "three hundred ninety-seven million, six hundred sixty-three thousand, eighty-five".