1312440049 has 2 divisors, whose sum is σ = 1312440050. Its totient is φ = 1312440048.

The previous prime is 1312439981. The next prime is 1312440083. The reversal of 1312440049 is 9400442131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1252098225 + 60341824 = 35385^2 + 7768^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312440049 - 2⁹ = 1312439537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1312439999 and 1312440026.

It is not a weakly prime, because it can be changed into another prime (1312443049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656220024 + 656220025.

It is an arithmetic number, because the mean of its divisors is an integer number (656220025).

Almost surely, 2^1312440049 is an apocalyptic number.

It is an amenable number.

1312440049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312440049 is an equidigital number, since it uses as much as digits as its factorization.

1312440049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 1312440049 is about 36227.6144536181. The cubic root of 1312440049 is about 1094.8631144609.

The spelling of 1312440049 in words is "one billion, three hundred twelve million, four hundred forty thousand, forty-nine".