120031729 has 2 divisors, whose sum is σ = 120031730. Its totient is φ = 120031728.

The previous prime is 120031711. The next prime is 120031741. The reversal of 120031729 is 927130021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92448225 + 27583504 = 9615^2 + 5252^2 .

It is an emirp because it is prime and its reverse (927130021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120031729 - 2¹⁷ = 119900657 is a prime.

It is not a weakly prime, because it can be changed into another prime (120031229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60015864 + 60015865.

It is an arithmetic number, because the mean of its divisors is an integer number (60015865).

Almost surely, 2^120031729 is an apocalyptic number.

It is an amenable number.

120031729 is a deficient number, since it is larger than the sum of its proper divisors (1).

120031729 is an equidigital number, since it uses as much as digits as its factorization.

120031729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 120031729 is about 10955.8992784709. The cubic root of 120031729 is about 493.2858835034.

The spelling of 120031729 in words is "one hundred twenty million, thirty-one thousand, seven hundred twenty-nine".