73281023989 has 2 divisors, whose sum is σ = 73281023990. Its totient is φ = 73281023988.

The previous prime is 73281023909. The next prime is 73281024067. The reversal of 73281023989 is 98932018237.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65041831089 + 8239192900 = 255033^2 + 90770^2 .

It is a cyclic number.

It is not a de Polignac number, because 73281023989 - 2⁹ = 73281023477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73281023909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36640511994 + 36640511995.

It is an arithmetic number, because the mean of its divisors is an integer number (36640511995).

Almost surely, 2^73281023989 is an apocalyptic number.

It is an amenable number.

73281023989 is a deficient number, since it is larger than the sum of its proper divisors (1).

73281023989 is an equidigital number, since it uses as much as digits as its factorization.

73281023989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1306368, while the sum is 52.

The spelling of 73281023989 in words is "seventy-three billion, two hundred eighty-one million, twenty-three thousand, nine hundred eighty-nine".