231487729 has 8 divisors (see below), whose sum is σ = 257297472. Its totient is φ = 206472240.

The previous prime is 231487727. The next prime is 231487733. The reversal of 231487729 is 927784132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231487729 - 2¹ = 231487727 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231487723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197949 + ... + 199114.

It is an arithmetic number, because the mean of its divisors is an integer number (32162184).

Almost surely, 2^231487729 is an apocalyptic number.

It is an amenable number.

231487729 is a deficient number, since it is larger than the sum of its proper divisors (25809743).

231487729 is a wasteful number, since it uses less digits than its factorization.

231487729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397127.

The product of its digits is 169344, while the sum is 43.

The square root of 231487729 is about 15214.7207992786. The cubic root of 231487729 is about 614.0107735769.

The spelling of 231487729 in words is "two hundred thirty-one million, four hundred eighty-seven thousand, seven hundred twenty-nine".