2127785979 has 16 divisors (see below), whose sum is σ = 3170450304. Its totient is φ = 1258113600.

The previous prime is 2127785939. The next prime is 2127785987. The reversal of 2127785979 is 9795877212.

It is a de Polignac number, because none of the positive numbers 2^k-2127785979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2127785939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 784969 + ... + 787674.

It is an arithmetic number, because the mean of its divisors is an integer number (198153144).

Almost surely, 2^2127785979 is an apocalyptic number.

2127785979 is a deficient number, since it is larger than the sum of its proper divisors (1042664325).

2127785979 is a wasteful number, since it uses less digits than its factorization.

2127785979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1572698.

The product of its digits is 4445280, while the sum is 57.

The square root of 2127785979 is about 46127.9305735690. The cubic root of 2127785979 is about 1286.2023959731.

The spelling of 2127785979 in words is "two billion, one hundred twenty-seven million, seven hundred eighty-five thousand, nine hundred seventy-nine".