122443649 has 2 divisors, whose sum is σ = 122443650. Its totient is φ = 122443648.

The previous prime is 122443637. The next prime is 122443663. The reversal of 122443649 is 946344221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105370225 + 17073424 = 10265^2 + 4132^2 .

It is a cyclic number.

It is not a de Polignac number, because 122443649 - 2⁸ = 122443393 is a prime.

It is not a weakly prime, because it can be changed into another prime (122443609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61221824 + 61221825.

It is an arithmetic number, because the mean of its divisors is an integer number (61221825).

Almost surely, 2^122443649 is an apocalyptic number.

It is an amenable number.

122443649 is a deficient number, since it is larger than the sum of its proper divisors (1).

122443649 is an equidigital number, since it uses as much as digits as its factorization.

122443649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 35.

The square root of 122443649 is about 11065.4258390719. The cubic root of 122443649 is about 496.5680290484.

The spelling of 122443649 in words is "one hundred twenty-two million, four hundred forty-three thousand, six hundred forty-nine".