539640949 has 2 divisors, whose sum is σ = 539640950. Its totient is φ = 539640948.

The previous prime is 539640947. The next prime is 539640989. The reversal of 539640949 is 949046935.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 494172900 + 45468049 = 22230^2 + 6743^2 .

It is a cyclic number.

It is not a de Polignac number, because 539640949 - 2¹ = 539640947 is a prime.

Together with 539640947, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (539640947) 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, 269820474 + 269820475.

It is an arithmetic number, because the mean of its divisors is an integer number (269820475).

Almost surely, 2^539640949 is an apocalyptic number.

It is an amenable number.

539640949 is a deficient number, since it is larger than the sum of its proper divisors (1).

539640949 is an equidigital number, since it uses as much as digits as its factorization.

539640949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1049760, while the sum is 49.

The square root of 539640949 is about 23230.1732451568. The cubic root of 539640949 is about 814.1447608212.

The spelling of 539640949 in words is "five hundred thirty-nine million, six hundred forty thousand, nine hundred forty-nine".