122655109 has 2 divisors, whose sum is σ = 122655110. Its totient is φ = 122655108.

The previous prime is 122655103. The next prime is 122655121. The reversal of 122655109 is 901556221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112826884 + 9828225 = 10622^2 + 3135^2 .

It is a cyclic number.

It is not a de Polignac number, because 122655109 - 2⁷ = 122654981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122655103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61327554 + 61327555.

It is an arithmetic number, because the mean of its divisors is an integer number (61327555).

Almost surely, 2^122655109 is an apocalyptic number.

It is an amenable number.

122655109 is a deficient number, since it is larger than the sum of its proper divisors (1).

122655109 is an equidigital number, since it uses as much as digits as its factorization.

122655109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 122655109 is about 11074.9767042644. The cubic root of 122655109 is about 496.8537220639.

The spelling of 122655109 in words is "one hundred twenty-two million, six hundred fifty-five thousand, one hundred nine".