819700512823 has 2 divisors, whose sum is σ = 819700512824. Its totient is φ = 819700512822.

The previous prime is 819700512817. The next prime is 819700512857. The reversal of 819700512823 is 328215007918.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-819700512823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (819700512023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409850256411 + 409850256412.

It is an arithmetic number, because the mean of its divisors is an integer number (409850256412).

Almost surely, 2^819700512823 is an apocalyptic number.

819700512823 is a deficient number, since it is larger than the sum of its proper divisors (1).

819700512823 is an equidigital number, since it uses as much as digits as its factorization.

819700512823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 46.

The spelling of 819700512823 in words is "eight hundred nineteen billion, seven hundred million, five hundred twelve thousand, eight hundred twenty-three".