199901017 has 2 divisors, whose sum is σ = 199901018. Its totient is φ = 199901016.

The previous prime is 199901003. The next prime is 199901021. The reversal of 199901017 is 710109991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 150283081 + 49617936 = 12259^2 + 7044^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199901017 is a prime.

It is not a weakly prime, because it can be changed into another prime (199901057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99950508 + 99950509.

It is an arithmetic number, because the mean of its divisors is an integer number (99950509).

Almost surely, 2^199901017 is an apocalyptic number.

It is an amenable number.

199901017 is a deficient number, since it is larger than the sum of its proper divisors (1).

199901017 is an equidigital number, since it uses as much as digits as its factorization.

199901017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5103, while the sum is 37.

The square root of 199901017 is about 14138.6356130993. The cubic root of 199901017 is about 584.7070557065.

The spelling of 199901017 in words is "one hundred ninety-nine million, nine hundred one thousand, seventeen".