122543893 has 2 divisors, whose sum is σ = 122543894. Its totient is φ = 122543892.

The previous prime is 122543891. The next prime is 122543909. The reversal of 122543893 is 398345221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79602084 + 42941809 = 8922^2 + 6553^2 .

It is a cyclic number.

It is not a de Polignac number, because 122543893 - 2¹ = 122543891 is a prime.

Together with 122543891, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122543891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61271946 + 61271947.

It is an arithmetic number, because the mean of its divisors is an integer number (61271947).

Almost surely, 2^122543893 is an apocalyptic number.

It is an amenable number.

122543893 is a deficient number, since it is larger than the sum of its proper divisors (1).

122543893 is an equidigital number, since it uses as much as digits as its factorization.

122543893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 37.

The square root of 122543893 is about 11069.9545166184. The cubic root of 122543893 is about 496.7035046672.

The spelling of 122543893 in words is "one hundred twenty-two million, five hundred forty-three thousand, eight hundred ninety-three".