540933721 has 2 divisors, whose sum is σ = 540933722. Its totient is φ = 540933720.

The previous prime is 540933713. The next prime is 540933733. The reversal of 540933721 is 127339045.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 284293321 + 256640400 = 16861^2 + 16020^2 .

It is a cyclic number.

It is not a de Polignac number, because 540933721 - 2³ = 540933713 is a prime.

It is not a weakly prime, because it can be changed into another prime (540933751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270466860 + 270466861.

It is an arithmetic number, because the mean of its divisors is an integer number (270466861).

Almost surely, 2^540933721 is an apocalyptic number.

It is an amenable number.

540933721 is a deficient number, since it is larger than the sum of its proper divisors (1).

540933721 is an equidigital number, since it uses as much as digits as its factorization.

540933721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 540933721 is about 23257.9818771965. The cubic root of 540933721 is about 814.7943681851.

The spelling of 540933721 in words is "five hundred forty million, nine hundred thirty-three thousand, seven hundred twenty-one".