1320431129 has 2 divisors, whose sum is σ = 1320431130. Its totient is φ = 1320431128.

The previous prime is 1320431111. The next prime is 1320431179. The reversal of 1320431129 is 9211340231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 951599104 + 368832025 = 30848^2 + 19205^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320431129 - 2²⁴ = 1303653913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1320431098 and 1320431107.

It is not a weakly prime, because it can be changed into another prime (1320431179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660215564 + 660215565.

It is an arithmetic number, because the mean of its divisors is an integer number (660215565).

Almost surely, 2^1320431129 is an apocalyptic number.

It is an amenable number.

1320431129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320431129 is an equidigital number, since it uses as much as digits as its factorization.

1320431129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1320431129 is about 36337.7369823714. The cubic root of 1320431129 is about 1097.0807247172.

The spelling of 1320431129 in words is "one billion, three hundred twenty million, four hundred thirty-one thousand, one hundred twenty-nine".