201715669979 has 2 divisors, whose sum is σ = 201715669980. Its totient is φ = 201715669978.

The previous prime is 201715669963. The next prime is 201715670027. The reversal of 201715669979 is 979966517102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201715669979 - 2⁴ = 201715669963 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (201715669079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100857834989 + 100857834990.

It is an arithmetic number, because the mean of its divisors is an integer number (100857834990).

Almost surely, 2^201715669979 is an apocalyptic number.

201715669979 is a deficient number, since it is larger than the sum of its proper divisors (1).

201715669979 is an equidigital number, since it uses as much as digits as its factorization.

201715669979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12859560, while the sum is 62.

The spelling of 201715669979 in words is "two hundred one billion, seven hundred fifteen million, six hundred sixty-nine thousand, nine hundred seventy-nine".