123456790049 has 2 divisors, whose sum is σ = 123456790050. Its totient is φ = 123456790048.

The previous prime is 123456790033. The next prime is 123456790123. The reversal of 123456790049 is 940097654321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86284950049 + 37171840000 = 293743^2 + 192800^2 .

It is a cyclic number.

It is not a de Polignac number, because 123456790049 - 2⁴ = 123456790033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123456789979 and 123456790006.

It is not a weakly prime, because it can be changed into another prime (123456700049) 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, 61728395024 + 61728395025.

It is an arithmetic number, because the mean of its divisors is an integer number (61728395025).

Almost surely, 2^123456790049 is an apocalyptic number.

It is an amenable number.

123456790049 is a deficient number, since it is larger than the sum of its proper divisors (1).

123456790049 is an equidigital number, since it uses as much as digits as its factorization.

123456790049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1632960, while the sum is 50.

The spelling of 123456790049 in words is "one hundred twenty-three billion, four hundred fifty-six million, seven hundred ninety thousand, forty-nine".