1311442949 has 2 divisors, whose sum is σ = 1311442950. Its totient is φ = 1311442948.

The previous prime is 1311442931. The next prime is 1311442961. The reversal of 1311442949 is 9492441131.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1088538049 + 222904900 = 32993^2 + 14930^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311442949 - 2¹² = 1311438853 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311442919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655721474 + 655721475.

It is an arithmetic number, because the mean of its divisors is an integer number (655721475).

Almost surely, 2^1311442949 is an apocalyptic number.

It is an amenable number.

1311442949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311442949 is an equidigital number, since it uses as much as digits as its factorization.

1311442949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 38.

The square root of 1311442949 is about 36213.8502371675. The cubic root of 1311442949 is about 1094.5857774524.

The spelling of 1311442949 in words is "one billion, three hundred eleven million, four hundred forty-two thousand, nine hundred forty-nine".