208812323496919 has 2 divisors, whose sum is σ = 208812323496920. Its totient is φ = 208812323496918.

The previous prime is 208812323496853. The next prime is 208812323496961. The reversal of 208812323496919 is 919694323218802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 208812323496919 - 2²⁹ = 208811786626007 is a prime.

It is a super-2 number, since 2×208812323496919² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208812323499919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104406161748459 + 104406161748460.

It is an arithmetic number, because the mean of its divisors is an integer number (104406161748460).

Almost surely, 2^{208812323496919} is an apocalyptic number.

208812323496919 is a deficient number, since it is larger than the sum of its proper divisors (1).

208812323496919 is an equidigital number, since it uses as much as digits as its factorization.

208812323496919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80621568, while the sum is 67.

The spelling of 208812323496919 in words is "two hundred eight trillion, eight hundred twelve billion, three hundred twenty-three million, four hundred ninety-six thousand, nine hundred nineteen".