120731738489 has 2 divisors, whose sum is σ = 120731738490. Its totient is φ = 120731738488.

The previous prime is 120731738429. The next prime is 120731738521. The reversal of 120731738489 is 984837137021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88661017600 + 32070720889 = 297760^2 + 179083^2 .

It is a cyclic number.

It is not a de Polignac number, because 120731738489 - 2⁸ = 120731738233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 120731738489.

It is not a weakly prime, because it can be changed into another prime (120731738419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60365869244 + 60365869245.

It is an arithmetic number, because the mean of its divisors is an integer number (60365869245).

Almost surely, 2^120731738489 is an apocalyptic number.

It is an amenable number.

120731738489 is a deficient number, since it is larger than the sum of its proper divisors (1).

120731738489 is an equidigital number, since it uses as much as digits as its factorization.

120731738489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2032128, while the sum is 53.

The spelling of 120731738489 in words is "one hundred twenty billion, seven hundred thirty-one million, seven hundred thirty-eight thousand, four hundred eighty-nine".