123196819 has 2 divisors, whose sum is σ = 123196820. Its totient is φ = 123196818.

The previous prime is 123196793. The next prime is 123196847. The reversal of 123196819 is 918691321.

It is a weak prime.

It is an emirp because it is prime and its reverse (918691321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123196819 - 2⁷ = 123196691 is a prime.

It is a super-2 number, since 2×123196819² = 30354912423437522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123196919) 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, 61598409 + 61598410.

It is an arithmetic number, because the mean of its divisors is an integer number (61598410).

Almost surely, 2^123196819 is an apocalyptic number.

123196819 is a deficient number, since it is larger than the sum of its proper divisors (1).

123196819 is an equidigital number, since it uses as much as digits as its factorization.

123196819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 40.

The square root of 123196819 is about 11099.4062453809. The cubic root of 123196819 is about 497.5841043639.

The spelling of 123196819 in words is "one hundred twenty-three million, one hundred ninety-six thousand, eight hundred nineteen".