1091920095 has 80 divisors (see below), whose sum is σ = 2244211200. Its totient is φ = 497555136.

The previous prime is 1091920091. The next prime is 1091920097. The reversal of 1091920095 is 5900291901.

It is not a de Polignac number, because 1091920095 - 2² = 1091920091 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091920091) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1697844 + ... + 1698486.

It is an arithmetic number, because the mean of its divisors is an integer number (28052640).

Almost surely, 2^1091920095 is an apocalyptic number.

1091920095 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1091920095 is an abundant number, since it is smaller than the sum of its proper divisors (1152291105).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1091920095 is an equidigital number, since it uses as much as digits as its factorization.

1091920095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266 (or 1257 counting only the distinct ones).

The product of its (nonzero) digits is 7290, while the sum is 36.

The square root of 1091920095 is about 33044.2142439490. The cubic root of 1091920095 is about 1029.7464091192.

The spelling of 1091920095 in words is "one billion, ninety-one million, nine hundred twenty thousand, ninety-five".