539776621 has 2 divisors, whose sum is σ = 539776622. Its totient is φ = 539776620.

The previous prime is 539776541. The next prime is 539776631. The reversal of 539776621 is 126677935.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 490622500 + 49154121 = 22150^2 + 7011^2 .

It is a cyclic number.

It is not a de Polignac number, because 539776621 - 2⁷ = 539776493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (539776631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269888310 + 269888311.

It is an arithmetic number, because the mean of its divisors is an integer number (269888311).

Almost surely, 2^539776621 is an apocalyptic number.

It is an amenable number.

539776621 is a deficient number, since it is larger than the sum of its proper divisors (1).

539776621 is an equidigital number, since it uses as much as digits as its factorization.

539776621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 476280, while the sum is 46.

The square root of 539776621 is about 23233.0932292710. The cubic root of 539776621 is about 814.2129835859.

The spelling of 539776621 in words is "five hundred thirty-nine million, seven hundred seventy-six thousand, six hundred twenty-one".