199964953 has 2 divisors, whose sum is σ = 199964954. Its totient is φ = 199964952.

The previous prime is 199964881. The next prime is 199964957. The reversal of 199964953 is 359469991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172213129 + 27751824 = 13123^2 + 5268^2 .

It is a cyclic number.

It is not a de Polignac number, because 199964953 - 2¹³ = 199956761 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 199964894 and 199964903.

It is not a weakly prime, because it can be changed into another prime (199964957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99982476 + 99982477.

It is an arithmetic number, because the mean of its divisors is an integer number (99982477).

Almost surely, 2^199964953 is an apocalyptic number.

It is an amenable number.

199964953 is a deficient number, since it is larger than the sum of its proper divisors (1).

199964953 is an equidigital number, since it uses as much as digits as its factorization.

199964953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2361960, while the sum is 55.

The square root of 199964953 is about 14140.8964708748. The cubic root of 199964953 is about 584.7693862972.

The spelling of 199964953 in words is "one hundred ninety-nine million, nine hundred sixty-four thousand, nine hundred fifty-three".