2123579291 has 4 divisors (see below), whose sum is σ = 2132464800. Its totient is φ = 2114693784.

The previous prime is 2123579273. The next prime is 2123579303. The reversal of 2123579291 is 1929753212.

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 2123579291 - 2²² = 2119384987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2123579231) 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, 4442396 + ... + 4442873.

It is an arithmetic number, because the mean of its divisors is an integer number (533116200).

Almost surely, 2^2123579291 is an apocalyptic number.

2123579291 is a deficient number, since it is larger than the sum of its proper divisors (8885509).

2123579291 is an equidigital number, since it uses as much as digits as its factorization.

2123579291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8885508.

The product of its digits is 68040, while the sum is 41.

The square root of 2123579291 is about 46082.3099572927. The cubic root of 2123579291 is about 1285.3542182857.

The spelling of 2123579291 in words is "two billion, one hundred twenty-three million, five hundred seventy-nine thousand, two hundred ninety-one".