540843869 has 2 divisors, whose sum is σ = 540843870. Its totient is φ = 540843868.

The previous prime is 540843859. The next prime is 540843883. The reversal of 540843869 is 968348045.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 492262969 + 48580900 = 22187^2 + 6970^2 .

It is a cyclic number.

It is not a de Polignac number, because 540843869 - 2⁸ = 540843613 is a prime.

It is a super-4 number, since 4×540843869⁴ (a number of 36 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (540843829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270421934 + 270421935.

It is an arithmetic number, because the mean of its divisors is an integer number (270421935).

Almost surely, 2^540843869 is an apocalyptic number.

It is an amenable number.

540843869 is a deficient number, since it is larger than the sum of its proper divisors (1).

540843869 is an equidigital number, since it uses as much as digits as its factorization.

540843869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 829440, while the sum is 47.

The square root of 540843869 is about 23256.0501590446. The cubic root of 540843869 is about 814.7492517782.

The spelling of 540843869 in words is "five hundred forty million, eight hundred forty-three thousand, eight hundred sixty-nine".