2113877977 has 2 divisors, whose sum is σ = 2113877978. Its totient is φ = 2113877976.

The previous prime is 2113877929. The next prime is 2113877989. The reversal of 2113877977 is 7797783112.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1453439376 + 660438601 = 38124^2 + 25699^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2113877977 is a prime.

It is a super-2 number, since 2×2113877977² = 8936960203291225058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2113877477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056938988 + 1056938989.

It is an arithmetic number, because the mean of its divisors is an integer number (1056938989).

Almost surely, 2^2113877977 is an apocalyptic number.

It is an amenable number.

2113877977 is a deficient number, since it is larger than the sum of its proper divisors (1).

2113877977 is an equidigital number, since it uses as much as digits as its factorization.

2113877977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1037232, while the sum is 52.

The square root of 2113877977 is about 45976.9287469270. The cubic root of 2113877977 is about 1283.3939018958.

The spelling of 2113877977 in words is "two billion, one hundred thirteen million, eight hundred seventy-seven thousand, nine hundred seventy-seven".