504793986989 has 2 divisors, whose sum is σ = 504793986990. Its totient is φ = 504793986988.

The previous prime is 504793986971. The next prime is 504793987037. The reversal of 504793986989 is 989689397405.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 482631710089 + 22162276900 = 694717^2 + 148870^2 .

It is a cyclic number.

It is not a de Polignac number, because 504793986989 - 2¹⁶ = 504793921453 is a prime.

It is a super-2 number, since 2×504793986989² (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 (504793986959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252396993494 + 252396993495.

It is an arithmetic number, because the mean of its divisors is an integer number (252396993495).

Almost surely, 2^504793986989 is an apocalyptic number.

It is an amenable number.

504793986989 is a deficient number, since it is larger than the sum of its proper divisors (1).

504793986989 is an equidigital number, since it uses as much as digits as its factorization.

504793986989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1058158080, while the sum is 77.

The spelling of 504793986989 in words is "five hundred four billion, seven hundred ninety-three million, nine hundred eighty-six thousand, nine hundred eighty-nine".