543654321 has 8 divisors (see below), whose sum is σ = 828425664. Its totient is φ = 310659600.

The previous prime is 543654299. The next prime is 543654367. The reversal of 543654321 is 123456345.

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

It is not a de Polignac number, because 543654321 - 2⁶ = 543654257 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (543654121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12944130 + ... + 12944171.

It is an arithmetic number, because the mean of its divisors is an integer number (103553208).

Almost surely, 2^543654321 is an apocalyptic number.

It is an amenable number.

543654321 is a deficient number, since it is larger than the sum of its proper divisors (284771343).

543654321 is a wasteful number, since it uses less digits than its factorization.

543654321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25888311.

The product of its digits is 43200, while the sum is 33.

The square root of 543654321 is about 23316.3959693603. The cubic root of 543654321 is about 816.1580741316.

The spelling of 543654321 in words is "five hundred forty-three million, six hundred fifty-four thousand, three hundred twenty-one".