1312350409 has 2 divisors, whose sum is σ = 1312350410. Its totient is φ = 1312350408.

The previous prime is 1312350383. The next prime is 1312350461. The reversal of 1312350409 is 9040532131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1299818809 + 12531600 = 36053^2 + 3540^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312350409 - 2⁹ = 1312349897 is a prime.

It is not a weakly prime, because it can be changed into another prime (1312350499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656175204 + 656175205.

It is an arithmetic number, because the mean of its divisors is an integer number (656175205).

Almost surely, 2^1312350409 is an apocalyptic number.

It is an amenable number.

1312350409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312350409 is an equidigital number, since it uses as much as digits as its factorization.

1312350409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 1312350409 is about 36226.3772547021. The cubic root of 1312350409 is about 1094.8381874140.

The spelling of 1312350409 in words is "one billion, three hundred twelve million, three hundred fifty thousand, four hundred nine".