100000209839977 has 2 divisors, whose sum is σ = 100000209839978. Its totient is φ = 100000209839976.

The previous prime is 100000209839891. The next prime is 100000209840061. The reversal of 100000209839977 is 779938902000001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89259016394601 + 10741193445376 = 9447699^2 + 3277376^2 .

It is an emirp because it is prime and its reverse (779938902000001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100000209839977 - 2¹¹ = 100000209837929 is a prime.

It is not a weakly prime, because it can be changed into another prime (100000209899977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50000104919988 + 50000104919989.

It is an arithmetic number, because the mean of its divisors is an integer number (50000104919989).

Almost surely, 2^{100000209839977} is an apocalyptic number.

It is an amenable number.

100000209839977 is a deficient number, since it is larger than the sum of its proper divisors (1).

100000209839977 is an equidigital number, since it uses as much as digits as its factorization.

100000209839977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1714608, while the sum is 55.

The spelling of 100000209839977 in words is "one hundred trillion, two hundred nine million, eight hundred thirty-nine thousand, nine hundred seventy-seven".