122951861 has 2 divisors, whose sum is σ = 122951862. Its totient is φ = 122951860.

The previous prime is 122951849. The next prime is 122951867. The reversal of 122951861 is 168159221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89889361 + 33062500 = 9481^2 + 5750^2 .

It is a cyclic number.

It is not a de Polignac number, because 122951861 - 2¹⁸ = 122689717 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122951867) 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, 61475930 + 61475931.

It is an arithmetic number, because the mean of its divisors is an integer number (61475931).

Almost surely, 2^122951861 is an apocalyptic number.

It is an amenable number.

122951861 is a deficient number, since it is larger than the sum of its proper divisors (1).

122951861 is an equidigital number, since it uses as much as digits as its factorization.

122951861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 35.

The square root of 122951861 is about 11088.3660202935. The cubic root of 122951861 is about 497.2540956238.

The spelling of 122951861 in words is "one hundred twenty-two million, nine hundred fifty-one thousand, eight hundred sixty-one".