1009728671 has 8 divisors (see below), whose sum is σ = 1154778240. Its totient is φ = 864879768.

The previous prime is 1009728661. The next prime is 1009728679. The reversal of 1009728671 is 1768279001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1009728671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1009728679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39221 + ... + 59646.

It is an arithmetic number, because the mean of its divisors is an integer number (144347280).

Almost surely, 2^1009728671 is an apocalyptic number.

1009728671 is a deficient number, since it is larger than the sum of its proper divisors (145049569).

1009728671 is an equidigital number, since it uses as much as digits as its factorization.

1009728671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100333.

The product of its (nonzero) digits is 42336, while the sum is 41.

The square root of 1009728671 is about 31776.2280801230. The cubic root of 1009728671 is about 1003.2324304685.

The spelling of 1009728671 in words is "one billion, nine million, seven hundred twenty-eight thousand, six hundred seventy-one".