1090049791 has 4 divisors (see below), whose sum is σ = 1092217392. Its totient is φ = 1087882192.

The previous prime is 1090049777. The next prime is 1090049827. The reversal of 1090049791 is 1979400901.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1979400901 = 457 ⋅4331293.

It is a cyclic number.

It is not a de Polignac number, because 1090049791 - 2⁵ = 1090049759 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1090049591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1083046 + ... + 1084051.

It is an arithmetic number, because the mean of its divisors is an integer number (273054348).

Almost surely, 2^1090049791 is an apocalyptic number.

1090049791 is a deficient number, since it is larger than the sum of its proper divisors (2167601).

1090049791 is an equidigital number, since it uses as much as digits as its factorization.

1090049791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2167600.

The product of its (nonzero) digits is 20412, while the sum is 40.

The square root of 1090049791 is about 33015.9020927795. The cubic root of 1090049791 is about 1029.1581366793.

The spelling of 1090049791 in words is "one billion, ninety million, forty-nine thousand, seven hundred ninety-one".