1312374209 has 2 divisors, whose sum is σ = 1312374210. Its totient is φ = 1312374208.

The previous prime is 1312374197. The next prime is 1312374221. The reversal of 1312374209 is 9024732131.

It is a balanced prime because it is at equal distance from previous prime (1312374197) and next prime (1312374221).

It can be written as a sum of positive squares in only one way, i.e., 1311888400 + 485809 = 36220^2 + 697^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312374209 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1312374299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656187104 + 656187105.

It is an arithmetic number, because the mean of its divisors is an integer number (656187105).

Almost surely, 2^1312374209 is an apocalyptic number.

It is an amenable number.

1312374209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312374209 is an equidigital number, since it uses as much as digits as its factorization.

1312374209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 1312374209 is about 36226.7057431393. The cubic root of 1312374209 is about 1094.8448058169.

The spelling of 1312374209 in words is "one billion, three hundred twelve million, three hundred seventy-four thousand, two hundred nine".