1091009291923 has 2 divisors, whose sum is σ = 1091009291924. Its totient is φ = 1091009291922.

The previous prime is 1091009291921. The next prime is 1091009291989. The reversal of 1091009291923 is 3291929001901.

1091009291923 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1091009291923 - 2¹ = 1091009291921 is a prime.

Together with 1091009291921, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1091009291921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 545504645961 + 545504645962.

It is an arithmetic number, because the mean of its divisors is an integer number (545504645962).

Almost surely, 2^{1091009291923} is an apocalyptic number.

1091009291923 is a deficient number, since it is larger than the sum of its proper divisors (1).

1091009291923 is an equidigital number, since it uses as much as digits as its factorization.

1091009291923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78732, while the sum is 46.

The spelling of 1091009291923 in words is "one trillion, ninety-one billion, nine million, two hundred ninety-one thousand, nine hundred twenty-three".