543491857 has 2 divisors, whose sum is σ = 543491858. Its totient is φ = 543491856.

The previous prime is 543491849. The next prime is 543491891. The reversal of 543491857 is 758194345.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 379626256 + 163865601 = 19484^2 + 12801^2 .

It is a cyclic number.

It is not a de Polignac number, because 543491857 - 2³ = 543491849 is a prime.

It is not a weakly prime, because it can be changed into another prime (543491957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271745928 + 271745929.

It is an arithmetic number, because the mean of its divisors is an integer number (271745929).

Almost surely, 2^543491857 is an apocalyptic number.

It is an amenable number.

543491857 is a deficient number, since it is larger than the sum of its proper divisors (1).

543491857 is an equidigital number, since it uses as much as digits as its factorization.

543491857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 604800, while the sum is 46.

The square root of 543491857 is about 23312.9118086952. The cubic root of 543491857 is about 816.0767666348.

The spelling of 543491857 in words is "five hundred forty-three million, four hundred ninety-one thousand, eight hundred fifty-seven".