231240000989 has 2 divisors, whose sum is σ = 231240000990. Its totient is φ = 231240000988.

The previous prime is 231240000923. The next prime is 231240001073. The reversal of 231240000989 is 989000042132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 231173448025 + 66552964 = 480805^2 + 8158^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231240000989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231240006989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115620000494 + 115620000495.

It is an arithmetic number, because the mean of its divisors is an integer number (115620000495).

Almost surely, 2^231240000989 is an apocalyptic number.

It is an amenable number.

231240000989 is a deficient number, since it is larger than the sum of its proper divisors (1).

231240000989 is an equidigital number, since it uses as much as digits as its factorization.

231240000989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 38.

The spelling of 231240000989 in words is "two hundred thirty-one billion, two hundred forty million, nine hundred eighty-nine", and thus it is an aban number.