229570729 has 2 divisors, whose sum is σ = 229570730. Its totient is φ = 229570728.

The previous prime is 229570723. The next prime is 229570741. The reversal of 229570729 is 927075922.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187060329 + 42510400 = 13677^2 + 6520^2 .

It is a cyclic number.

It is not a de Polignac number, because 229570729 - 2³ = 229570721 is a prime.

It is a super-2 number, since 2×229570729² = 105405439227182882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (229570721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114785364 + 114785365.

It is an arithmetic number, because the mean of its divisors is an integer number (114785365).

Almost surely, 2^229570729 is an apocalyptic number.

It is an amenable number.

229570729 is a deficient number, since it is larger than the sum of its proper divisors (1).

229570729 is an equidigital number, since it uses as much as digits as its factorization.

229570729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 158760, while the sum is 43.

The square root of 229570729 is about 15151.5916325645. The cubic root of 229570729 is about 612.3111545538.

The spelling of 229570729 in words is "two hundred twenty-nine million, five hundred seventy thousand, seven hundred twenty-nine".