1311212473 has 2 divisors, whose sum is σ = 1311212474. Its totient is φ = 1311212472.

The previous prime is 1311212453. The next prime is 1311212479. The reversal of 1311212473 is 3742121131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 946669824 + 364542649 = 30768^2 + 19093^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311212473 - 2¹³ = 1311204281 is a prime.

It is not a weakly prime, because it can be changed into another prime (1311212479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655606236 + 655606237.

It is an arithmetic number, because the mean of its divisors is an integer number (655606237).

Almost surely, 2^1311212473 is an apocalyptic number.

It is an amenable number.

1311212473 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311212473 is an equidigital number, since it uses as much as digits as its factorization.

1311212473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 25.

The square root of 1311212473 is about 36210.6679446817. The cubic root of 1311212473 is about 1094.5216520218.

The spelling of 1311212473 in words is "one billion, three hundred eleven million, two hundred twelve thousand, four hundred seventy-three".