231180949 has 2 divisors, whose sum is σ = 231180950. Its totient is φ = 231180948.

The previous prime is 231180947. The next prime is 231180959. The reversal of 231180949 is 949081132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 225540324 + 5640625 = 15018^2 + 2375^2 .

It is a cyclic number.

It is not a de Polignac number, because 231180949 - 2¹ = 231180947 is a prime.

Together with 231180947, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231180941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115590474 + 115590475.

It is an arithmetic number, because the mean of its divisors is an integer number (115590475).

Almost surely, 2^231180949 is an apocalyptic number.

It is an amenable number.

231180949 is a deficient number, since it is larger than the sum of its proper divisors (1).

231180949 is an equidigital number, since it uses as much as digits as its factorization.

231180949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 231180949 is about 15204.6357733423. The cubic root of 231180949 is about 613.7394136244.

The spelling of 231180949 in words is "two hundred thirty-one million, one hundred eighty thousand, nine hundred forty-nine".