543970991 has 2 divisors, whose sum is σ = 543970992. Its totient is φ = 543970990.

The previous prime is 543970979. The next prime is 543971023. The reversal of 543970991 is 199079345.

543970991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 543970991 - 2²² = 539776687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (543970901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271985495 + 271985496.

It is an arithmetic number, because the mean of its divisors is an integer number (271985496).

Almost surely, 2^543970991 is an apocalyptic number.

543970991 is a deficient number, since it is larger than the sum of its proper divisors (1).

543970991 is an equidigital number, since it uses as much as digits as its factorization.

543970991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 306180, while the sum is 47.

The square root of 543970991 is about 23323.1856957835. The cubic root of 543970991 is about 816.3165097416.

The spelling of 543970991 in words is "five hundred forty-three million, nine hundred seventy thousand, nine hundred ninety-one".