122317939 has 2 divisors, whose sum is σ = 122317940. Its totient is φ = 122317938.

The previous prime is 122317913. The next prime is 122317957. The reversal of 122317939 is 939713221.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (939713221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 122317939 - 2²³ = 113929331 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122317898 and 122317907.

It is not a weakly prime, because it can be changed into another prime (122317999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61158969 + 61158970.

It is an arithmetic number, because the mean of its divisors is an integer number (61158970).

Almost surely, 2^122317939 is an apocalyptic number.

122317939 is a deficient number, since it is larger than the sum of its proper divisors (1).

122317939 is an equidigital number, since it uses as much as digits as its factorization.

122317939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20412, while the sum is 37.

The square root of 122317939 is about 11059.7440747967. The cubic root of 122317939 is about 496.3980326390.

It can be divided in two parts, 122317 and 939, that added together give a triangular number (123256 = T₄₉₆).

The spelling of 122317939 in words is "one hundred twenty-two million, three hundred seventeen thousand, nine hundred thirty-nine".