231301229989 has 2 divisors, whose sum is σ = 231301229990. Its totient is φ = 231301229988.

The previous prime is 231301229987. The next prime is 231301230103. The reversal of 231301229989 is 989922103132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 227400228225 + 3901001764 = 476865^2 + 62458^2 .

It is a cyclic number.

It is not a de Polignac number, because 231301229989 - 2¹ = 231301229987 is a prime.

Together with 231301229987, 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 (231301229983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115650614994 + 115650614995.

It is an arithmetic number, because the mean of its divisors is an integer number (115650614995).

Almost surely, 2^231301229989 is an apocalyptic number.

It is an amenable number.

231301229989 is a deficient number, since it is larger than the sum of its proper divisors (1).

231301229989 is an equidigital number, since it uses as much as digits as its factorization.

231301229989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 49.

The spelling of 231301229989 in words is "two hundred thirty-one billion, three hundred one million, two hundred twenty-nine thousand, nine hundred eighty-nine".