1311422149 has 2 divisors, whose sum is σ = 1311422150. Its totient is φ = 1311422148.

The previous prime is 1311422131. The next prime is 1311422221. The reversal of 1311422149 is 9412241131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1293840900 + 17581249 = 35970^2 + 4193^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311422149 - 2¹¹ = 1311420101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311422129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655711074 + 655711075.

It is an arithmetic number, because the mean of its divisors is an integer number (655711075).

Almost surely, 2^1311422149 is an apocalyptic number.

It is an amenable number.

1311422149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311422149 is an equidigital number, since it uses as much as digits as its factorization.

1311422149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 28.

The square root of 1311422149 is about 36213.5630530883. The cubic root of 1311422149 is about 1094.5799905685.

The spelling of 1311422149 in words is "one billion, three hundred eleven million, four hundred twenty-two thousand, one hundred forty-nine".