230939729 has 4 divisors (see below), whose sum is σ = 231094080. Its totient is φ = 230785380.

The previous prime is 230939707. The next prime is 230939741. The reversal of 230939729 is 927939032.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-230939729 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 230939729.

It is not an unprimeable number, because it can be changed into a prime (230939029) 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, 74909 + ... + 77930.

It is an arithmetic number, because the mean of its divisors is an integer number (57773520).

Almost surely, 2^230939729 is an apocalyptic number.

It is an amenable number.

230939729 is a deficient number, since it is larger than the sum of its proper divisors (154351).

230939729 is a wasteful number, since it uses less digits than its factorization.

230939729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154350.

The product of its (nonzero) digits is 183708, while the sum is 44.

The square root of 230939729 is about 15196.7012538906. The cubic root of 230939729 is about 613.5258756381.

The spelling of 230939729 in words is "two hundred thirty million, nine hundred thirty-nine thousand, seven hundred twenty-nine".