1328907641 has 2 divisors, whose sum is σ = 1328907642. Its totient is φ = 1328907640.

The previous prime is 1328907599. The next prime is 1328907649. The reversal of 1328907641 is 1467098231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1177519225 + 151388416 = 34315^2 + 12304^2 .

It is a cyclic number.

It is not a de Polignac number, because 1328907641 - 2²⁶ = 1261798777 is a prime.

It is not a weakly prime, because it can be changed into another prime (1328907649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664453820 + 664453821.

It is an arithmetic number, because the mean of its divisors is an integer number (664453821).

Almost surely, 2^1328907641 is an apocalyptic number.

It is an amenable number.

1328907641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1328907641 is an equidigital number, since it uses as much as digits as its factorization.

1328907641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 1328907641 is about 36454.1855072912. The cubic root of 1328907641 is about 1099.4232902565.

The spelling of 1328907641 in words is "one billion, three hundred twenty-eight million, nine hundred seven thousand, six hundred forty-one".