122357819 has 2 divisors, whose sum is σ = 122357820. Its totient is φ = 122357818.

The previous prime is 122357813. The next prime is 122357821. The reversal of 122357819 is 918753221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122357819 is a prime.

It is a super-2 number, since 2×122357819² = 29942871740873522, which contains 22 as substring.

Together with 122357821, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (122357813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61178909 + 61178910.

It is an arithmetic number, because the mean of its divisors is an integer number (61178910).

Almost surely, 2^122357819 is an apocalyptic number.

122357819 is a deficient number, since it is larger than the sum of its proper divisors (1).

122357819 is an equidigital number, since it uses as much as digits as its factorization.

122357819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 38.

The square root of 122357819 is about 11061.5468628940. The cubic root of 122357819 is about 496.4519745836.

The spelling of 122357819 in words is "one hundred twenty-two million, three hundred fifty-seven thousand, eight hundred nineteen".