1081520647 has 2 divisors, whose sum is σ = 1081520648. Its totient is φ = 1081520646.

The previous prime is 1081520639. The next prime is 1081520663. The reversal of 1081520647 is 7460251801.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1081520647 - 2³ = 1081520639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1081520617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540760323 + 540760324.

It is an arithmetic number, because the mean of its divisors is an integer number (540760324).

Almost surely, 2^1081520647 is an apocalyptic number.

1081520647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1081520647 is an equidigital number, since it uses as much as digits as its factorization.

1081520647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 1081520647 is about 32886.4812194920. The cubic root of 1081520647 is about 1026.4668736261.

The spelling of 1081520647 in words is "one billion, eighty-one million, five hundred twenty thousand, six hundred forty-seven".