229961 has 2 divisors, whose sum is σ = 229962. Its totient is φ = 229960.

The previous prime is 229949. The next prime is 229963. The reversal of 229961 is 169922.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 219961 + 10000 = 469^2 + 100^2 .

It is a cyclic number.

It is not a de Polignac number, because 229961 - 2⁶ = 229897 is a prime.

It is a Sophie Germain prime.

Together with 229963, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 229961.

It is not a weakly prime, because it can be changed into another prime (229963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114980 + 114981.

It is an arithmetic number, because the mean of its divisors is an integer number (114981).

2²²⁹⁹⁶¹ is an apocalyptic number.

It is an amenable number.

229961 is a deficient number, since it is larger than the sum of its proper divisors (1).

229961 is an equidigital number, since it uses as much as digits as its factorization.

229961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 29.

The square root of 229961 is about 479.5424902967. The cubic root of 229961 is about 61.2657935116.

The spelling of 229961 in words is "two hundred twenty-nine thousand, nine hundred sixty-one".