123347989049 has 2 divisors, whose sum is σ = 123347989050. Its totient is φ = 123347989048.

The previous prime is 123347989031. The next prime is 123347989087. The reversal of 123347989049 is 940989743321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122565108649 + 782880400 = 350093^2 + 27980^2 .

It is an emirp because it is prime and its reverse (940989743321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123347989049 - 2⁸ = 123347988793 is a prime.

It is not a weakly prime, because it can be changed into another prime (123347989019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61673994524 + 61673994525.

It is an arithmetic number, because the mean of its divisors is an integer number (61673994525).

Almost surely, 2^123347989049 is an apocalyptic number.

It is an amenable number.

123347989049 is a deficient number, since it is larger than the sum of its proper divisors (1).

123347989049 is an equidigital number, since it uses as much as digits as its factorization.

123347989049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11757312, while the sum is 59.

The spelling of 123347989049 in words is "one hundred twenty-three billion, three hundred forty-seven million, nine hundred eighty-nine thousand, forty-nine".