504691938391 has 2 divisors, whose sum is σ = 504691938392. Its totient is φ = 504691938390.

The previous prime is 504691938353. The next prime is 504691938437. The reversal of 504691938391 is 193839196405.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 504691938391 - 2⁹ = 504691937879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (504691938691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252345969195 + 252345969196.

It is an arithmetic number, because the mean of its divisors is an integer number (252345969196).

Almost surely, 2^504691938391 is an apocalyptic number.

504691938391 is a deficient number, since it is larger than the sum of its proper divisors (1).

504691938391 is an equidigital number, since it uses as much as digits as its factorization.

504691938391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6298560, while the sum is 58.

The spelling of 504691938391 in words is "five hundred four billion, six hundred ninety-one million, nine hundred thirty-eight thousand, three hundred ninety-one".