1091044681 has 8 divisors (see below), whose sum is σ = 1112002560. Its totient is φ = 1070280288.

The previous prime is 1091044679. The next prime is 1091044781. The reversal of 1091044681 is 1864401901.

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

It is a cyclic number.

It is not a de Polignac number, because 1091044681 - 2¹ = 1091044679 is a prime.

It is a super-2 number, since 2×1091044681² = 2380756991876783522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1091044631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36961 + ... + 59566.

It is an arithmetic number, because the mean of its divisors is an integer number (139000320).

Almost surely, 2^1091044681 is an apocalyptic number.

It is an amenable number.

1091044681 is a deficient number, since it is larger than the sum of its proper divisors (20957879).

1091044681 is an equidigital number, since it uses as much as digits as its factorization.

1091044681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96743.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 1091044681 is about 33030.9654869488. The cubic root of 1091044681 is about 1029.4711461706.

The spelling of 1091044681 in words is "one billion, ninety-one million, forty-four thousand, six hundred eighty-one".