1311888433 has 2 divisors, whose sum is σ = 1311888434. Its totient is φ = 1311888432.

The previous prime is 1311888337. The next prime is 1311888449. The reversal of 1311888433 is 3348881131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1283287329 + 28601104 = 35823^2 + 5348^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311888433 is a prime.

It is not a weakly prime, because it can be changed into another prime (1311888463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655944216 + 655944217.

It is an arithmetic number, because the mean of its divisors is an integer number (655944217).

Almost surely, 2^1311888433 is an apocalyptic number.

It is an amenable number.

1311888433 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311888433 is an equidigital number, since it uses as much as digits as its factorization.

1311888433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 40.

The square root of 1311888433 is about 36220.0004555494. Note that the first 3 decimals coincide. The cubic root of 1311888433 is about 1094.7097033536.

The spelling of 1311888433 in words is "one billion, three hundred eleven million, eight hundred eighty-eight thousand, four hundred thirty-three".