2102019977 has 2 divisors, whose sum is σ = 2102019978. Its totient is φ = 2102019976.

The previous prime is 2102019949. The next prime is 2102020003. The reversal of 2102019977 is 7799102012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1925103376 + 176916601 = 43876^2 + 13301^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102019977 - 2⁸ = 2102019721 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2102019977.

It is not a weakly prime, because it can be changed into another prime (2102019277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051009988 + 1051009989.

It is an arithmetic number, because the mean of its divisors is an integer number (1051009989).

Almost surely, 2^2102019977 is an apocalyptic number.

It is an amenable number.

2102019977 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102019977 is an equidigital number, since it uses as much as digits as its factorization.

2102019977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15876, while the sum is 38.

The square root of 2102019977 is about 45847.7914080929. The cubic root of 2102019977 is about 1280.9896271324.

The spelling of 2102019977 in words is "two billion, one hundred two million, nineteen thousand, nine hundred seventy-seven".