100206978317 has 2 divisors, whose sum is σ = 100206978318. Its totient is φ = 100206978316.

The previous prime is 100206978283. The next prime is 100206978331. The reversal of 100206978317 is 713879602001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72970757161 + 27236221156 = 270131^2 + 165034^2 .

It is a cyclic number.

It is not a de Polignac number, because 100206978317 - 2¹⁰ = 100206977293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100206978337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50103489158 + 50103489159.

It is an arithmetic number, because the mean of its divisors is an integer number (50103489159).

Almost surely, 2^100206978317 is an apocalyptic number.

It is an amenable number.

100206978317 is a deficient number, since it is larger than the sum of its proper divisors (1).

100206978317 is an equidigital number, since it uses as much as digits as its factorization.

100206978317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 44.

The spelling of 100206978317 in words is "one hundred billion, two hundred six million, nine hundred seventy-eight thousand, three hundred seventeen".