122971949 has 2 divisors, whose sum is σ = 122971950. Its totient is φ = 122971948.

The previous prime is 122971939. The next prime is 122971951. The reversal of 122971949 is 949179221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95199049 + 27772900 = 9757^2 + 5270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122971949 is a prime.

Together with 122971951, 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 (122971909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61485974 + 61485975.

It is an arithmetic number, because the mean of its divisors is an integer number (61485975).

Almost surely, 2^122971949 is an apocalyptic number.

It is an amenable number.

122971949 is a deficient number, since it is larger than the sum of its proper divisors (1).

122971949 is an equidigital number, since it uses as much as digits as its factorization.

122971949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 44.

The square root of 122971949 is about 11089.2717975528. The cubic root of 122971949 is about 497.2811747756.

The spelling of 122971949 in words is "one hundred twenty-two million, nine hundred seventy-one thousand, nine hundred forty-nine".