229316729 has 4 divisors (see below), whose sum is σ = 231459984. Its totient is φ = 227173476.

The previous prime is 229316687. The next prime is 229316767. The reversal of 229316729 is 927613922.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 927613922 = 2 ⋅463806961.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-229316729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (229316429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1071467 + ... + 1071680.

It is an arithmetic number, because the mean of its divisors is an integer number (57864996).

Almost surely, 2^229316729 is an apocalyptic number.

It is an amenable number.

229316729 is a deficient number, since it is larger than the sum of its proper divisors (2143255).

229316729 is a wasteful number, since it uses less digits than its factorization.

229316729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2143254.

The product of its digits is 81648, while the sum is 41.

The square root of 229316729 is about 15143.2073551147. The cubic root of 229316729 is about 612.0852482456.

The spelling of 229316729 in words is "two hundred twenty-nine million, three hundred sixteen thousand, seven hundred twenty-nine".