2091694899 has 24 divisors (see below), whose sum is σ = 3348922368. Its totient is φ = 1156695120.

The previous prime is 2091694897. The next prime is 2091694901. The reversal of 2091694899 is 9984961902.

It is an interprime number because it is at equal distance from previous prime (2091694897) and next prime (2091694901).

It is not a de Polignac number, because 2091694899 - 2¹ = 2091694897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2091694897) 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 23 ways as a sum of consecutive naturals, for example, 224947 + ... + 234060.

It is an arithmetic number, because the mean of its divisors is an integer number (139538432).

Almost surely, 2^2091694899 is an apocalyptic number.

2091694899 is a deficient number, since it is larger than the sum of its proper divisors (1257227469).

2091694899 is a wasteful number, since it uses less digits than its factorization.

2091694899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459055 (or 459048 counting only the distinct ones).

The product of its (nonzero) digits is 2519424, while the sum is 57.

The square root of 2091694899 is about 45735.0510986923. The cubic root of 2091694899 is about 1278.8887855529. Note that the first 3 decimals are identical.

The spelling of 2091694899 in words is "two billion, ninety-one million, six hundred ninety-four thousand, eight hundred ninety-nine".