1309630969 has 2 divisors, whose sum is σ = 1309630970. Its totient is φ = 1309630968.

The previous prime is 1309630961. The next prime is 1309631027. The reversal of 1309630969 is 9690369031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1288810000 + 20820969 = 35900^2 + 4563^2 .

It is a cyclic number.

It is not a de Polignac number, because 1309630969 - 2³ = 1309630961 is a prime.

It is a super-2 number, since 2×1309630969² = 3430266549927757922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1309630961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 654815484 + 654815485.

It is an arithmetic number, because the mean of its divisors is an integer number (654815485).

Almost surely, 2^1309630969 is an apocalyptic number.

It is an amenable number.

1309630969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1309630969 is an equidigital number, since it uses as much as digits as its factorization.

1309630969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 236196, while the sum is 46.

The square root of 1309630969 is about 36188.8238134372. The cubic root of 1309630969 is about 1094.0814267059.

The spelling of 1309630969 in words is "one billion, three hundred nine million, six hundred thirty thousand, nine hundred sixty-nine".