200011961 has 2 divisors, whose sum is σ = 200011962. Its totient is φ = 200011960.

The previous prime is 200011949. The next prime is 200012003. The reversal of 200011961 is 169110002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199939600 + 72361 = 14140^2 + 269^2 .

It is a cyclic number.

It is not a de Polignac number, because 200011961 - 2²⁶ = 132903097 is a prime.

It is not a weakly prime, because it can be changed into another prime (200011061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100005980 + 100005981.

It is an arithmetic number, because the mean of its divisors is an integer number (100005981).

Almost surely, 2^200011961 is an apocalyptic number.

It is an amenable number.

200011961 is a deficient number, since it is larger than the sum of its proper divisors (1).

200011961 is an equidigital number, since it uses as much as digits as its factorization.

200011961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 200011961 is about 14142.5585026190. The cubic root of 200011961 is about 584.8152054689.

Adding to 200011961 its reverse (169110002), we get a palindrome (369121963).

The spelling of 200011961 in words is "two hundred million, eleven thousand, nine hundred sixty-one".