397837685 has 8 divisors (see below), whose sum is σ = 545606016. Its totient is φ = 272802960.

The previous prime is 397837679. The next prime is 397837709. The reversal of 397837685 is 586738793.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 397837685 - 2¹⁰ = 397836661 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 397837685.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5683361 + ... + 5683430.

It is an arithmetic number, because the mean of its divisors is an integer number (68200752).

Almost surely, 2^397837685 is an apocalyptic number.

397837685 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

397837685 is a deficient number, since it is larger than the sum of its proper divisors (147768331).

397837685 is a wasteful number, since it uses less digits than its factorization.

397837685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11366803.

The product of its digits is 7620480, while the sum is 56.

The square root of 397837685 is about 19945.8688705205. The cubic root of 397837685 is about 735.4762273833.

The spelling of 397837685 in words is "three hundred ninety-seven million, eight hundred thirty-seven thousand, six hundred eighty-five".