1312676249 has 2 divisors, whose sum is σ = 1312676250. Its totient is φ = 1312676248.

The previous prime is 1312676243. The next prime is 1312676257. The reversal of 1312676249 is 9426762131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1091113024 + 221563225 = 33032^2 + 14885^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312676249 is a prime.

It is not a weakly prime, because it can be changed into another prime (1312676243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656338124 + 656338125.

It is an arithmetic number, because the mean of its divisors is an integer number (656338125).

Almost surely, 2^1312676249 is an apocalyptic number.

It is an amenable number.

1312676249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312676249 is an equidigital number, since it uses as much as digits as its factorization.

1312676249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 41.

The square root of 1312676249 is about 36230.8742511135. The cubic root of 1312676249 is about 1094.9287914050.

The spelling of 1312676249 in words is "one billion, three hundred twelve million, six hundred seventy-six thousand, two hundred forty-nine".