397634685 has 32 divisors (see below), whose sum is σ = 731764992. Its totient is φ = 180610560.

The previous prime is 397634681. The next prime is 397634701. The reversal of 397634685 is 586436793.

397634685 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 397634685 - 2² = 397634681 is a prime.

It is a super-2 number, since 2×397634685² = 316226685430098450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397634681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4425 + ... + 28545.

It is an arithmetic number, because the mean of its divisors is an integer number (22867656).

Almost surely, 2^397634685 is an apocalyptic number.

397634685 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

397634685 is a deficient number, since it is larger than the sum of its proper divisors (334130307).

397634685 is a wasteful number, since it uses less digits than its factorization.

397634685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24293.

The product of its digits is 3265920, while the sum is 51.

The square root of 397634685 is about 19940.7794481560. The cubic root of 397634685 is about 735.3511118055.

The spelling of 397634685 in words is "three hundred ninety-seven million, six hundred thirty-four thousand, six hundred eighty-five".