923981768819 has 2 divisors, whose sum is σ = 923981768820. Its totient is φ = 923981768818.

The previous prime is 923981768797. The next prime is 923981768833. The reversal of 923981768819 is 918867189329.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-923981768819 is a prime.

It is a super-2 number, since 2×923981768819² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (923981768219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 461990884409 + 461990884410.

It is an arithmetic number, because the mean of its divisors is an integer number (461990884410).

Almost surely, 2^923981768819 is an apocalyptic number.

923981768819 is a deficient number, since it is larger than the sum of its proper divisors (1).

923981768819 is an equidigital number, since it uses as much as digits as its factorization.

923981768819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94058496, while the sum is 71.

The spelling of 923981768819 in words is "nine hundred twenty-three billion, nine hundred eighty-one million, seven hundred sixty-eight thousand, eight hundred nineteen".