1311623069 has 2 divisors, whose sum is σ = 1311623070. Its totient is φ = 1311623068.

The previous prime is 1311623009. The next prime is 1311623077. The reversal of 1311623069 is 9603261131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1282570969 + 29052100 = 35813^2 + 5390^2 .

It is an emirp because it is prime and its reverse (9603261131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1311623069 - 2⁸ = 1311622813 is a prime.

It is a super-2 number, since 2×1311623069² = 3440710150265957522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311623009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655811534 + 655811535.

It is an arithmetic number, because the mean of its divisors is an integer number (655811535).

Almost surely, 2^1311623069 is an apocalyptic number.

It is an amenable number.

1311623069 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311623069 is an equidigital number, since it uses as much as digits as its factorization.

1311623069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 1311623069 is about 36216.3370455931. The cubic root of 1311623069 is about 1094.6358870829.

The spelling of 1311623069 in words is "one billion, three hundred eleven million, six hundred twenty-three thousand, sixty-nine".