1288328651 has 2 divisors, whose sum is σ = 1288328652. Its totient is φ = 1288328650.

The previous prime is 1288328621. The next prime is 1288328677. The reversal of 1288328651 is 1568238821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1288328651 - 2²² = 1284134347 is a prime.

It is not a weakly prime, because it can be changed into another prime (1288328621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 644164325 + 644164326.

It is an arithmetic number, because the mean of its divisors is an integer number (644164326).

Almost surely, 2^1288328651 is an apocalyptic number.

1288328651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1288328651 is an equidigital number, since it uses as much as digits as its factorization.

1288328651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 184320, while the sum is 44.

The square root of 1288328651 is about 35893.2953488531. The cubic root of 1288328651 is about 1088.1168986974.

The spelling of 1288328651 in words is "one billion, two hundred eighty-eight million, three hundred twenty-eight thousand, six hundred fifty-one".