1030720129 has 2 divisors, whose sum is σ = 1030720130. Its totient is φ = 1030720128.

The previous prime is 1030720123. The next prime is 1030720213. The reversal of 1030720129 is 9210270301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 951599104 + 79121025 = 30848^2 + 8895^2 .

It is a cyclic number.

It is not a de Polignac number, because 1030720129 - 2⁹ = 1030719617 is a prime.

It is not a weakly prime, because it can be changed into another prime (1030720123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515360064 + 515360065.

It is an arithmetic number, because the mean of its divisors is an integer number (515360065).

Almost surely, 2^1030720129 is an apocalyptic number.

It is an amenable number.

1030720129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1030720129 is an equidigital number, since it uses as much as digits as its factorization.

1030720129 is an evil number, because the sum of its binary digits is even.

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

The square root of 1030720129 is about 32104.8303063573. The cubic root of 1030720129 is about 1010.1369382670.

The spelling of 1030720129 in words is "one billion, thirty million, seven hundred twenty thousand, one hundred twenty-nine".