122459999 has 2 divisors, whose sum is σ = 122460000. Its totient is φ = 122459998.

The previous prime is 122459983. The next prime is 122460029. The reversal of 122459999 is 999954221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 122459999 - 2⁴ = 122459983 is a prime.

It is a Sophie Germain prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122459929) 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, 61229999 + 61230000.

It is an arithmetic number, because the mean of its divisors is an integer number (61230000).

Almost surely, 2^122459999 is an apocalyptic number.

122459999 is a deficient number, since it is larger than the sum of its proper divisors (1).

122459999 is an equidigital number, since it uses as much as digits as its factorization.

122459999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 524880, while the sum is 50.

The square root of 122459999 is about 11066.1646020652. The cubic root of 122459999 is about 496.5901304422.

The spelling of 122459999 in words is "one hundred twenty-two million, four hundred fifty-nine thousand, nine hundred ninety-nine".