1307728841 has 2 divisors, whose sum is σ = 1307728842. Its totient is φ = 1307728840.

The previous prime is 1307728817. The next prime is 1307728843. The reversal of 1307728841 is 1488277031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1051056400 + 256672441 = 32420^2 + 16021^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1307728841 is a prime.

It is a Sophie Germain prime.

Together with 1307728843, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1307728843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 653864420 + 653864421.

It is an arithmetic number, because the mean of its divisors is an integer number (653864421).

Almost surely, 2^1307728841 is an apocalyptic number.

It is an amenable number.

1307728841 is a deficient number, since it is larger than the sum of its proper divisors (1).

1307728841 is an equidigital number, since it uses as much as digits as its factorization.

1307728841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 1307728841 is about 36162.5336640009. The cubic root of 1307728841 is about 1093.5514832049.

The spelling of 1307728841 in words is "one billion, three hundred seven million, seven hundred twenty-eight thousand, eight hundred forty-one".