122845819 has 2 divisors, whose sum is σ = 122845820. Its totient is φ = 122845818.

The previous prime is 122845771. The next prime is 122845823. The reversal of 122845819 is 918548221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122845819 is a prime.

It is a super-2 number, since 2×122845819² = 30182190491561522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (122840819) 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, 61422909 + 61422910.

It is an arithmetic number, because the mean of its divisors is an integer number (61422910).

Almost surely, 2^122845819 is an apocalyptic number.

122845819 is a deficient number, since it is larger than the sum of its proper divisors (1).

122845819 is an equidigital number, since it uses as much as digits as its factorization.

122845819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46080, while the sum is 40.

The square root of 122845819 is about 11083.5833104642. The cubic root of 122845819 is about 497.1110993191. Note that the first 3 decimals are identical.

The spelling of 122845819 in words is "one hundred twenty-two million, eight hundred forty-five thousand, eight hundred nineteen".