399240048539 has 2 divisors, whose sum is σ = 399240048540. Its totient is φ = 399240048538.

The previous prime is 399240048511. The next prime is 399240048541. The reversal of 399240048539 is 935840042993.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 399240048539 - 2¹⁶ = 399239983003 is a prime.

Together with 399240048541, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (399240048439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199620024269 + 199620024270.

It is an arithmetic number, because the mean of its divisors is an integer number (199620024270).

Almost surely, 2^399240048539 is an apocalyptic number.

399240048539 is a deficient number, since it is larger than the sum of its proper divisors (1).

399240048539 is an equidigital number, since it uses as much as digits as its factorization.

399240048539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8398080, while the sum is 56.

The spelling of 399240048539 in words is "three hundred ninety-nine billion, two hundred forty million, forty-eight thousand, five hundred thirty-nine".