2189764799 has 4 divisors (see below), whose sum is σ = 2265273960. Its totient is φ = 2114255640.

The previous prime is 2189764789. The next prime is 2189764813. The reversal of 2189764799 is 9974679812.

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 2189764799 - 2²⁰ = 2188716223 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 (2189764789) 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, 37754537 + ... + 37754594.

It is an arithmetic number, because the mean of its divisors is an integer number (566318490).

Almost surely, 2^2189764799 is an apocalyptic number.

2189764799 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

2189764799 is a deficient number, since it is larger than the sum of its proper divisors (75509161).

2189764799 is an equidigital number, since it uses as much as digits as its factorization.

2189764799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75509160.

The product of its digits is 13716864, while the sum is 62.

The square root of 2189764799 is about 46794.9227908328. The cubic root of 2189764799 is about 1298.5713692448.

The spelling of 2189764799 in words is "two billion, one hundred eighty-nine million, seven hundred sixty-four thousand, seven hundred ninety-nine".