531782376975389 has 2 divisors, whose sum is σ = 531782376975390. Its totient is φ = 531782376975388.

The previous prime is 531782376975277. The next prime is 531782376975461. The reversal of 531782376975389 is 983579673287135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 509904586858489 + 21877790116900 = 22581067^2 + 4677370^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-531782376975389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531782376974389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265891188487694 + 265891188487695.

It is an arithmetic number, because the mean of its divisors is an integer number (265891188487695).

Almost surely, 2^{531782376975389} is an apocalyptic number.

It is an amenable number.

531782376975389 is a deficient number, since it is larger than the sum of its proper divisors (1).

531782376975389 is an equidigital number, since it uses as much as digits as its factorization.

531782376975389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14402707200, while the sum is 83.

The spelling of 531782376975389 in words is "five hundred thirty-one trillion, seven hundred eighty-two billion, three hundred seventy-six million, nine hundred seventy-five thousand, three hundred eighty-nine".