199999998953 has 2 divisors, whose sum is σ = 199999998954. Its totient is φ = 199999998952.

The previous prime is 199999998893. The next prime is 199999998971. The reversal of 199999998953 is 359899999991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109156230544 + 90843768409 = 330388^2 + 301403^2 .

It is a cyclic number.

It is not a de Polignac number, because 199999998953 - 2⁸ = 199999998697 is a prime.

It is not a weakly prime, because it can be changed into another prime (199999998973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99999999476 + 99999999477.

It is an arithmetic number, because the mean of its divisors is an integer number (99999999477).

Almost surely, 2^199999998953 is an apocalyptic number.

It is an amenable number.

199999998953 is a deficient number, since it is larger than the sum of its proper divisors (1).

199999998953 is an equidigital number, since it uses as much as digits as its factorization.

199999998953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5165606520, while the sum is 89.

The spelling of 199999998953 in words is "one hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-eight thousand, nine hundred fifty-three".