1091799709 has 16 divisors (see below), whose sum is σ = 1465914240. Its totient is φ = 785309760.

The previous prime is 1091799697. The next prime is 1091799791. The reversal of 1091799709 is 9079971901.

It is a cyclic number.

It is not a de Polignac number, because 1091799709 - 2¹⁵ = 1091766941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091799409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 544354 + ... + 546355.

It is an arithmetic number, because the mean of its divisors is an integer number (91619640).

Almost surely, 2^1091799709 is an apocalyptic number.

It is an amenable number.

1091799709 is a deficient number, since it is larger than the sum of its proper divisors (374114531).

1091799709 is a wasteful number, since it uses less digits than its factorization.

1091799709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090740.

The product of its (nonzero) digits is 321489, while the sum is 52.

The square root of 1091799709 is about 33042.3926040473. The cubic root of 1091799709 is about 1029.7085639789.

It can be divided in two parts, 10 and 91799709, that added together give a palindrome (91799719).

The spelling of 1091799709 in words is "one billion, ninety-one million, seven hundred ninety-nine thousand, seven hundred nine".