505231012433989 has 2 divisors, whose sum is σ = 505231012433990. Its totient is φ = 505231012433988.

The previous prime is 505231012433957. The next prime is 505231012434131. The reversal of 505231012433989 is 989334210132505.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 502490057364100 + 2740955069889 = 22416290^2 + 1655583^2 .

It is a cyclic number.

It is not a de Polignac number, because 505231012433989 - 2⁵ = 505231012433957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505231012433689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252615506216994 + 252615506216995.

It is an arithmetic number, because the mean of its divisors is an integer number (252615506216995).

Almost surely, 2^{505231012433989} is an apocalyptic number.

It is an amenable number.

505231012433989 is a deficient number, since it is larger than the sum of its proper divisors (1).

505231012433989 is an equidigital number, since it uses as much as digits as its factorization.

505231012433989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6998400, while the sum is 55.

The spelling of 505231012433989 in words is "five hundred five trillion, two hundred thirty-one billion, twelve million, four hundred thirty-three thousand, nine hundred eighty-nine".