122243993 has 2 divisors, whose sum is σ = 122243994. Its totient is φ = 122243992.

The previous prime is 122243987. The next prime is 122244029. The reversal of 122243993 is 399342221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109662784 + 12581209 = 10472^2 + 3547^2 .

It is a cyclic number.

It is not a de Polignac number, because 122243993 - 2¹⁰ = 122242969 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (122243963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61121996 + 61121997.

It is an arithmetic number, because the mean of its divisors is an integer number (61121997).

Almost surely, 2^122243993 is an apocalyptic number.

It is an amenable number.

122243993 is a deficient number, since it is larger than the sum of its proper divisors (1).

122243993 is an equidigital number, since it uses as much as digits as its factorization.

122243993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 35.

The square root of 122243993 is about 11056.4005444810. The cubic root of 122243993 is about 496.2979817700.

The spelling of 122243993 in words is "one hundred twenty-two million, two hundred forty-three thousand, nine hundred ninety-three".