2091966709 has 8 divisors (see below), whose sum is σ = 2516651840. Its totient is φ = 1698739776.

The previous prime is 2091966703. The next prime is 2091966731. The reversal of 2091966709 is 9076691902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2091966709 - 2⁵ = 2091966677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091966703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7864404 + ... + 7864669.

It is an arithmetic number, because the mean of its divisors is an integer number (314581480).

Almost surely, 2^2091966709 is an apocalyptic number.

It is an amenable number.

2091966709 is a deficient number, since it is larger than the sum of its proper divisors (424685131).

2091966709 is a wasteful number, since it uses less digits than its factorization.

2091966709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15729099.

The product of its (nonzero) digits is 367416, while the sum is 49.

The square root of 2091966709 is about 45738.0225742215. The cubic root of 2091966709 is about 1278.9441791805.

The spelling of 2091966709 in words is "two billion, ninety-one million, nine hundred sixty-six thousand, seven hundred nine".