230729561 has 2 divisors, whose sum is σ = 230729562. Its totient is φ = 230729560.

The previous prime is 230729501. The next prime is 230729573. The reversal of 230729561 is 165927032.

230729561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 219040000 + 11689561 = 14800^2 + 3419^2 .

It is a cyclic number.

It is not a de Polignac number, because 230729561 - 2¹⁸ = 230467417 is a prime.

It is a super-2 number, since 2×230729561² = 106472260638505442, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (230729501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115364780 + 115364781.

It is an arithmetic number, because the mean of its divisors is an integer number (115364781).

Almost surely, 2^230729561 is an apocalyptic number.

It is an amenable number.

230729561 is a deficient number, since it is larger than the sum of its proper divisors (1).

230729561 is an equidigital number, since it uses as much as digits as its factorization.

230729561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 230729561 is about 15189.7847581854. The cubic root of 230729561 is about 613.3397049262.

The spelling of 230729561 in words is "two hundred thirty million, seven hundred twenty-nine thousand, five hundred sixty-one".