223606961 has 2 divisors, whose sum is σ = 223606962. Its totient is φ = 223606960.

The previous prime is 223606951. The next prime is 223606963. The reversal of 223606961 is 169606322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136072225 + 87534736 = 11665^2 + 9356^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223606961 is a prime.

Together with 223606963, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (223606963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111803480 + 111803481.

It is an arithmetic number, because the mean of its divisors is an integer number (111803481).

Almost surely, 2^223606961 is an apocalyptic number.

It is an amenable number.

223606961 is a deficient number, since it is larger than the sum of its proper divisors (1).

223606961 is an equidigital number, since it uses as much as digits as its factorization.

223606961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 223606961 is about 14953.4932708047. The cubic root of 223606961 is about 606.9623787125.

The spelling of 223606961 in words is "two hundred twenty-three million, six hundred six thousand, nine hundred sixty-one".