122147819 has 2 divisors, whose sum is σ = 122147820. Its totient is φ = 122147818.

The previous prime is 122147813. The next prime is 122147833. The reversal of 122147819 is 918741221.

It is a weak prime.

It is an emirp because it is prime and its reverse (918741221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122147819 is a prime.

It is a super-4 number, since 4×122147819⁴ (a number of 33 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (122147813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61073909 + 61073910.

It is an arithmetic number, because the mean of its divisors is an integer number (61073910).

Almost surely, 2^122147819 is an apocalyptic number.

122147819 is a deficient number, since it is larger than the sum of its proper divisors (1).

122147819 is an equidigital number, since it uses as much as digits as its factorization.

122147819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 35.

The square root of 122147819 is about 11052.0504432436. The cubic root of 122147819 is about 496.1677954553.

The spelling of 122147819 in words is "one hundred twenty-two million, one hundred forty-seven thousand, eight hundred nineteen".