1009481729 has 2 divisors, whose sum is σ = 1009481730. Its totient is φ = 1009481728.

The previous prime is 1009481719. The next prime is 1009481783. The reversal of 1009481729 is 9271849001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1006158400 + 3323329 = 31720^2 + 1823^2 .

It is a cyclic number.

It is not a de Polignac number, because 1009481729 - 2⁴ = 1009481713 is a prime.

It is a super-2 number, since 2×1009481729² = 2038106722369658882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1009481719) 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, 504740864 + 504740865.

It is an arithmetic number, because the mean of its divisors is an integer number (504740865).

Almost surely, 2^1009481729 is an apocalyptic number.

It is an amenable number.

1009481729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1009481729 is an equidigital number, since it uses as much as digits as its factorization.

1009481729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 41.

The square root of 1009481729 is about 31772.3422019844. The cubic root of 1009481729 is about 1003.1506393799.

The spelling of 1009481729 in words is "one billion, nine million, four hundred eighty-one thousand, seven hundred twenty-nine".