1288323331 has 2 divisors, whose sum is σ = 1288323332. Its totient is φ = 1288323330.

The previous prime is 1288323293. The next prime is 1288323343. The reversal of 1288323331 is 1333238821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1288323331 - 2²⁵ = 1254768899 is a prime.

It is a super-2 number, since 2×1288323331² = 3319554010397871122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1288323371) 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, 644161665 + 644161666.

It is an arithmetic number, because the mean of its divisors is an integer number (644161666).

Almost surely, 2^1288323331 is an apocalyptic number.

1288323331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1288323331 is an equidigital number, since it uses as much as digits as its factorization.

1288323331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 34.

The square root of 1288323331 is about 35893.2212402286. The cubic root of 1288323331 is about 1088.1154009455.

The spelling of 1288323331 in words is "one billion, two hundred eighty-eight million, three hundred twenty-three thousand, three hundred thirty-one".