231322637789 has 2 divisors, whose sum is σ = 231322637790. Its totient is φ = 231322637788.

The previous prime is 231322637783. The next prime is 231322637873. The reversal of 231322637789 is 987736223132.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 223414092889 + 7908544900 = 472667^2 + 88930^2 .

It is a cyclic number.

It is not a de Polignac number, because 231322637789 - 2¹² = 231322633693 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231322637789.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231322637783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115661318894 + 115661318895.

It is an arithmetic number, because the mean of its divisors is an integer number (115661318895).

Almost surely, 2^231322637789 is an apocalyptic number.

It is an amenable number.

231322637789 is a deficient number, since it is larger than the sum of its proper divisors (1).

231322637789 is an equidigital number, since it uses as much as digits as its factorization.

231322637789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4572288, while the sum is 53.

The spelling of 231322637789 in words is "two hundred thirty-one billion, three hundred twenty-two million, six hundred thirty-seven thousand, seven hundred eighty-nine".