2127866491 has 4 divisors (see below), whose sum is σ = 2132523112. Its totient is φ = 2123209872.

The previous prime is 2127866479. The next prime is 2127866509. The reversal of 2127866491 is 1946687212.

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 2127866491 - 2²³ = 2119477883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2127866441) 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, 2327625 + ... + 2328538.

It is an arithmetic number, because the mean of its divisors is an integer number (533130778).

Almost surely, 2^2127866491 is an apocalyptic number.

2127866491 is a deficient number, since it is larger than the sum of its proper divisors (4656621).

2127866491 is an equidigital number, since it uses as much as digits as its factorization.

2127866491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4656620.

The product of its digits is 290304, while the sum is 46.

The square root of 2127866491 is about 46128.8032686737. The cubic root of 2127866491 is about 1286.2186183786.

The spelling of 2127866491 in words is "two billion, one hundred twenty-seven million, eight hundred sixty-six thousand, four hundred ninety-one".