397285143 has 8 divisors (see below), whose sum is σ = 537619968. Its totient is φ = 260903544.

The previous prime is 397285139. The next prime is 397285171. The reversal of 397285143 is 341582793.

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

It is not a de Polignac number, because 397285143 - 2² = 397285139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 397285095 and 397285104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397285103) 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 7 ways as a sum of consecutive naturals, for example, 988071 + ... + 988472.

It is an arithmetic number, because the mean of its divisors is an integer number (67202496).

Almost surely, 2^397285143 is an apocalyptic number.

397285143 is a deficient number, since it is larger than the sum of its proper divisors (140334825).

397285143 is a wasteful number, since it uses less digits than its factorization.

397285143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1976613.

The product of its digits is 181440, while the sum is 42.

The square root of 397285143 is about 19932.0130192613. The cubic root of 397285143 is about 735.1355777480.

The spelling of 397285143 in words is "three hundred ninety-seven million, two hundred eighty-five thousand, one hundred forty-three".