122738981 has 2 divisors, whose sum is σ = 122738982. Its totient is φ = 122738980.

The previous prime is 122738969. The next prime is 122738983. The reversal of 122738981 is 189837221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96216481 + 26522500 = 9809^2 + 5150^2 .

It is a cyclic number.

It is not a de Polignac number, because 122738981 - 2¹⁰ = 122737957 is a prime.

It is a super-2 number, since 2×122738981² = 30129714913836722, which contains 22 as substring.

Together with 122738983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122738983) 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, 61369490 + 61369491.

It is an arithmetic number, because the mean of its divisors is an integer number (61369491).

Almost surely, 2^122738981 is an apocalyptic number.

It is an amenable number.

122738981 is a deficient number, since it is larger than the sum of its proper divisors (1).

122738981 is an equidigital number, since it uses as much as digits as its factorization.

122738981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 41.

The square root of 122738981 is about 11078.7626114111. The cubic root of 122738981 is about 496.9669463745.

The spelling of 122738981 in words is "one hundred twenty-two million, seven hundred thirty-eight thousand, nine hundred eighty-one".