1091641893 has 32 divisors (see below), whose sum is σ = 1620124416. Its totient is φ = 650293248.

The previous prime is 1091641891. The next prime is 1091641897. The reversal of 1091641893 is 3981461901.

It is not a de Polignac number, because 1091641893 - 2¹ = 1091641891 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091641891) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 157305 + ... + 164097.

It is an arithmetic number, because the mean of its divisors is an integer number (50628888).

Almost surely, 2^1091641893 is an apocalyptic number.

It is an amenable number.

1091641893 is a deficient number, since it is larger than the sum of its proper divisors (528482523).

1091641893 is a wasteful number, since it uses less digits than its factorization.

1091641893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6973.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 1091641893 is about 33040.0044340191. The cubic root of 1091641893 is about 1029.6589479441.

The spelling of 1091641893 in words is "one billion, ninety-one million, six hundred forty-one thousand, eight hundred ninety-three".