543985639 has 2 divisors, whose sum is σ = 543985640. Its totient is φ = 543985638.

The previous prime is 543985621. The next prime is 543985649. The reversal of 543985639 is 936589345.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 543985639 - 2¹¹ = 543983591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (543985649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271992819 + 271992820.

It is an arithmetic number, because the mean of its divisors is an integer number (271992820).

Almost surely, 2^543985639 is an apocalyptic number.

543985639 is a deficient number, since it is larger than the sum of its proper divisors (1).

543985639 is an equidigital number, since it uses as much as digits as its factorization.

543985639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3499200, while the sum is 52.

The square root of 543985639 is about 23323.4997159517. The cubic root of 543985639 is about 816.3238369074.

The spelling of 543985639 in words is "five hundred forty-three million, nine hundred eighty-five thousand, six hundred thirty-nine".