1091680799 has 4 divisors (see below), whose sum is σ = 1190924520. Its totient is φ = 992437080.

The previous prime is 1091680787. The next prime is 1091680813. The reversal of 1091680799 is 9970861901.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1091680799 - 2⁴ = 1091680783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091680729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49621844 + ... + 49621865.

It is an arithmetic number, because the mean of its divisors is an integer number (297731130).

Almost surely, 2^1091680799 is an apocalyptic number.

1091680799 is a deficient number, since it is larger than the sum of its proper divisors (99243721).

1091680799 is an equidigital number, since it uses as much as digits as its factorization.

1091680799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99243720.

The product of its (nonzero) digits is 244944, while the sum is 50.

The square root of 1091680799 is about 33040.5931998807. The cubic root of 1091680799 is about 1029.6711801103.

The spelling of 1091680799 in words is "one billion, ninety-one million, six hundred eighty thousand, seven hundred ninety-nine".