504999992381 has 2 divisors, whose sum is σ = 504999992382. Its totient is φ = 504999992380.

The previous prime is 504999992359. The next prime is 504999992429. The reversal of 504999992381 is 183299999405.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 321358603225 + 183641389156 = 566885^2 + 428534^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-504999992381 is a prime.

It is a super-2 number, since 2×504999992381² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (504999922381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252499996190 + 252499996191.

It is an arithmetic number, because the mean of its divisors is an integer number (252499996191).

Almost surely, 2^504999992381 is an apocalyptic number.

It is an amenable number.

504999992381 is a deficient number, since it is larger than the sum of its proper divisors (1).

504999992381 is an equidigital number, since it uses as much as digits as its factorization.

504999992381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56687040, while the sum is 68.

The spelling of 504999992381 in words is "five hundred four billion, nine hundred ninety-nine million, nine hundred ninety-two thousand, three hundred eighty-one".