1091296647 has 12 divisors (see below), whose sum is σ = 1801505680. Its totient is φ = 623598048.

The previous prime is 1091296643. The next prime is 1091296667. The reversal of 1091296647 is 7466921901.

It is not a de Polignac number, because 1091296647 - 2² = 1091296643 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091296643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8661022 + ... + 8661147.

Almost surely, 2^1091296647 is an apocalyptic number.

1091296647 is a deficient number, since it is larger than the sum of its proper divisors (710209033).

1091296647 is a wasteful number, since it uses less digits than its factorization.

1091296647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17322182 (or 17322179 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 1091296647 is about 33034.7793544924. The cubic root of 1091296647 is about 1029.5503888041.

The spelling of 1091296647 in words is "one billion, ninety-one million, two hundred ninety-six thousand, six hundred forty-seven".