397372543 has 4 divisors (see below), whose sum is σ = 402160248. Its totient is φ = 392584840.

The previous prime is 397372513. The next prime is 397372559. The reversal of 397372543 is 345273793.

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

It is a cyclic number.

It is not a de Polignac number, because 397372543 - 2²⁵ = 363818111 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 397372543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397372513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2393728 + ... + 2393893.

It is an arithmetic number, because the mean of its divisors is an integer number (100540062).

Almost surely, 2^397372543 is an apocalyptic number.

397372543 is a deficient number, since it is larger than the sum of its proper divisors (4787705).

397372543 is an equidigital number, since it uses as much as digits as its factorization.

397372543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4787704.

The product of its digits is 476280, while the sum is 43.

The square root of 397372543 is about 19934.2053516061. The cubic root of 397372543 is about 735.1894820529.

The spelling of 397372543 in words is "three hundred ninety-seven million, three hundred seventy-two thousand, five hundred forty-three".