2830191209 has 4 divisors (see below), whose sum is σ = 2830472916. Its totient is φ = 2829909504.

The previous prime is 2830191191. The next prime is 2830191211. The reversal of 2830191209 is 9021910382.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1801578025 + 1028613184 = 42445^2 + 32072^2 .

It is a cyclic number.

It is not a de Polignac number, because 2830191209 - 2²⁸ = 2561755753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2830191509) 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, 125204 + ... + 146069.

It is an arithmetic number, because the mean of its divisors is an integer number (707618229).

Almost surely, 2^2830191209 is an apocalyptic number.

It is an amenable number.

2830191209 is a deficient number, since it is larger than the sum of its proper divisors (281707).

2830191209 is a wasteful number, since it uses less digits than its factorization.

2830191209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281706.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 2830191209 is about 53199.5414359936. The cubic root of 2830191209 is about 1414.5075153112.

The spelling of 2830191209 in words is "two billion, eight hundred thirty million, one hundred ninety-one thousand, two hundred nine".