1091108249 has 16 divisors (see below), whose sum is σ = 1364084736. Its totient is φ = 847875600.

The previous prime is 1091108233. The next prime is 1091108251. The reversal of 1091108249 is 9428011901.

It is not a de Polignac number, because 1091108249 - 2⁴ = 1091108233 is a prime.

It is a super-2 number, since 2×1091108249² = 2381034422071692002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1091108279) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8954 + ... + 47564.

It is an arithmetic number, because the mean of its divisors is an integer number (85255296).

Almost surely, 2^1091108249 is an apocalyptic number.

It is an amenable number.

1091108249 is a deficient number, since it is larger than the sum of its proper divisors (272976487).

1091108249 is a wasteful number, since it uses less digits than its factorization.

1091108249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38996.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 1091108249 is about 33031.9277215242. The cubic root of 1091108249 is about 1029.4911392873.

The spelling of 1091108249 in words is "one billion, ninety-one million, one hundred eight thousand, two hundred forty-nine".