540553421 has 2 divisors, whose sum is σ = 540553422. Its totient is φ = 540553420.

The previous prime is 540553411. The next prime is 540553427. The reversal of 540553421 is 124355045.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 532963396 + 7590025 = 23086^2 + 2755^2 .

It is a cyclic number.

It is not a de Polignac number, because 540553421 - 2¹⁴ = 540537037 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (540553427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270276710 + 270276711.

It is an arithmetic number, because the mean of its divisors is an integer number (270276711).

Almost surely, 2^540553421 is an apocalyptic number.

It is an amenable number.

540553421 is a deficient number, since it is larger than the sum of its proper divisors (1).

540553421 is an equidigital number, since it uses as much as digits as its factorization.

540553421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 540553421 is about 23249.8047518683. The cubic root of 540553421 is about 814.6033780933.

The spelling of 540553421 in words is "five hundred forty million, five hundred fifty-three thousand, four hundred twenty-one".