71231903489 has 2 divisors, whose sum is σ = 71231903490. Its totient is φ = 71231903488.

The previous prime is 71231903359. The next prime is 71231903539. The reversal of 71231903489 is 98430913217.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66306250000 + 4925653489 = 257500^2 + 70183^2 .

It is a cyclic number.

It is not a de Polignac number, because 71231903489 - 2²⁴ = 71215126273 is a prime.

It is not a weakly prime, because it can be changed into another prime (71231903989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35615951744 + 35615951745.

It is an arithmetic number, because the mean of its divisors is an integer number (35615951745).

Almost surely, 2^71231903489 is an apocalyptic number.

It is an amenable number.

71231903489 is a deficient number, since it is larger than the sum of its proper divisors (1).

71231903489 is an equidigital number, since it uses as much as digits as its factorization.

71231903489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 47.

The spelling of 71231903489 in words is "seventy-one billion, two hundred thirty-one million, nine hundred three thousand, four hundred eighty-nine".