397256343 has 16 divisors (see below), whose sum is σ = 584793216. Its totient is φ = 237859040.

The previous prime is 397256341. The next prime is 397256347. The reversal of 397256343 is 343652793.

It is a cyclic number.

It is not a de Polignac number, because 397256343 - 2¹ = 397256341 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 397256295 and 397256304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397256341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69780 + ... + 75257.

It is an arithmetic number, because the mean of its divisors is an integer number (36549576).

Almost surely, 2^397256343 is an apocalyptic number.

397256343 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

397256343 is a deficient number, since it is larger than the sum of its proper divisors (187536873).

397256343 is a wasteful number, since it uses less digits than its factorization.

397256343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145134.

The product of its digits is 408240, while the sum is 42.

The square root of 397256343 is about 19931.2905502880. The cubic root of 397256343 is about 735.1178134993.

The spelling of 397256343 in words is "three hundred ninety-seven million, two hundred fifty-six thousand, three hundred forty-three".