397859543 has 4 divisors (see below), whose sum is σ = 415157808. Its totient is φ = 380561280.

The previous prime is 397859533. The next prime is 397859573. The reversal of 397859543 is 345958793.

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 397859543 - 2¹⁸ = 397597399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397859533) 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, 8649098 + ... + 8649143.

It is an arithmetic number, because the mean of its divisors is an integer number (103789452).

Almost surely, 2^397859543 is an apocalyptic number.

397859543 is a deficient number, since it is larger than the sum of its proper divisors (17298265).

397859543 is a wasteful number, since it uses less digits than its factorization.

397859543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17298264.

The product of its digits is 4082400, while the sum is 53.

The square root of 397859543 is about 19946.4167960062. The cubic root of 397859543 is about 735.4896966495.

The spelling of 397859543 in words is "three hundred ninety-seven million, eight hundred fifty-nine thousand, five hundred forty-three".