543675721 has 4 divisors (see below), whose sum is σ = 551790352. Its totient is φ = 535561092.

The previous prime is 543675701. The next prime is 543675733. The reversal of 543675721 is 127576345.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 543675721 - 2⁵ = 543675689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (543675701) 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, 4057215 + ... + 4057348.

It is an arithmetic number, because the mean of its divisors is an integer number (137947588).

Almost surely, 2^543675721 is an apocalyptic number.

It is an amenable number.

543675721 is a deficient number, since it is larger than the sum of its proper divisors (8114631).

543675721 is an equidigital number, since it uses as much as digits as its factorization.

543675721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8114630.

The product of its digits is 176400, while the sum is 40.

The square root of 543675721 is about 23316.8548693858. The cubic root of 543675721 is about 816.1687828687.

The spelling of 543675721 in words is "five hundred forty-three million, six hundred seventy-five thousand, seven hundred twenty-one".