122689481 has 2 divisors, whose sum is σ = 122689482. Its totient is φ = 122689480.

The previous prime is 122689451. The next prime is 122689499. The reversal of 122689481 is 184986221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122655625 + 33856 = 11075^2 + 184^2 .

It is a cyclic number.

It is not a de Polignac number, because 122689481 - 2⁶ = 122689417 is a prime.

It is a super-2 number, since 2×122689481² = 30105417496098722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (122689451) 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, 61344740 + 61344741.

It is an arithmetic number, because the mean of its divisors is an integer number (61344741).

Almost surely, 2^122689481 is an apocalyptic number.

It is an amenable number.

122689481 is a deficient number, since it is larger than the sum of its proper divisors (1).

122689481 is an equidigital number, since it uses as much as digits as its factorization.

122689481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 41.

The square root of 122689481 is about 11076.5283821241. The cubic root of 122689481 is about 496.9001293199.

The spelling of 122689481 in words is "one hundred twenty-two million, six hundred eighty-nine thousand, four hundred eighty-one".