229894357729 has 3 divisors (see below), whose sum is σ = 229894837203. Its totient is φ = 229893878256.

The previous prime is 229894357697. The next prime is 229894357733. The reversal of 229894357729 is 927753498922.

The square root of 229894357729 is 479473.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 927753498922 = 2 ⋅463876749461.

It can be written as a sum of positive squares in only one way, i.e., 179517453025 + 50376904704 = 423695^2 + 224448^2 .

It is not a de Polignac number, because 229894357729 - 2⁵ = 229894357697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (229894357739) 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 in 2 ways as a sum of consecutive naturals, for example, 239737 + ... + 719209.

It is an arithmetic number, because the mean of its divisors is an integer number (76631612401).

Almost surely, 2^229894357729 is an apocalyptic number.

229894357729 is the 479473-rd square number.

229894357729 is the 239737-th centered octagonal number.

It is an amenable number.

229894357729 is a deficient number, since it is larger than the sum of its proper divisors (479474).

229894357729 is an frugal number, since it uses more digits than its factorization.

229894357729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 958946 (or 479473 counting only the distinct ones).

The product of its digits is 137168640, while the sum is 67.

The spelling of 229894357729 in words is "two hundred twenty-nine billion, eight hundred ninety-four million, three hundred fifty-seven thousand, seven hundred twenty-nine".