231848009 has 2 divisors, whose sum is σ = 231848010. Its totient is φ = 231848008.

The previous prime is 231847997. The next prime is 231848047. The reversal of 231848009 is 900848132.

It is a happy number.

231848009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191905609 + 39942400 = 13853^2 + 6320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231848009 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231848009.

It is not a weakly prime, because it can be changed into another prime (231841009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115924004 + 115924005.

It is an arithmetic number, because the mean of its divisors is an integer number (115924005).

Almost surely, 2^231848009 is an apocalyptic number.

It is an amenable number.

231848009 is a deficient number, since it is larger than the sum of its proper divisors (1).

231848009 is an equidigital number, since it uses as much as digits as its factorization.

231848009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 231848009 is about 15226.5560452783. The cubic root of 231848009 is about 614.3291506204.

The spelling of 231848009 in words is "two hundred thirty-one million, eight hundred forty-eight thousand, nine".