540046621 has 2 divisors, whose sum is σ = 540046622. Its totient is φ = 540046620.

The previous prime is 540046609. The next prime is 540046631. The reversal of 540046621 is 126640045.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 531809721 + 8236900 = 23061^2 + 2870^2 .

It is a cyclic number.

It is not a de Polignac number, because 540046621 - 2²¹ = 537949469 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 540046621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (540046631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270023310 + 270023311.

It is an arithmetic number, because the mean of its divisors is an integer number (270023311).

Almost surely, 2^540046621 is an apocalyptic number.

It is an amenable number.

540046621 is a deficient number, since it is larger than the sum of its proper divisors (1).

540046621 is an equidigital number, since it uses as much as digits as its factorization.

540046621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 540046621 is about 23238.9031797974. The cubic root of 540046621 is about 814.3487192788.

Adding to 540046621 its reverse (126640045), we get a palindrome (666686666).

The spelling of 540046621 in words is "five hundred forty million, forty-six thousand, six hundred twenty-one".