122995819 has 2 divisors, whose sum is σ = 122995820. Its totient is φ = 122995818.

The previous prime is 122995813. The next prime is 122995861. The reversal of 122995819 is 918599221.

It is a weak prime.

It is an emirp because it is prime and its reverse (918599221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 122995819 - 2⁹ = 122995307 is a prime.

It is a super-2 number, since 2×122995819² = 30255942982961522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (122995813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61497909 + 61497910.

It is an arithmetic number, because the mean of its divisors is an integer number (61497910).

Almost surely, 2^122995819 is an apocalyptic number.

122995819 is a deficient number, since it is larger than the sum of its proper divisors (1).

122995819 is an equidigital number, since it uses as much as digits as its factorization.

122995819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 46.

The square root of 122995819 is about 11090.3480107704. The cubic root of 122995819 is about 497.3133483289.

The spelling of 122995819 in words is "one hundred twenty-two million, nine hundred ninety-five thousand, eight hundred nineteen".