999860762819 has 2 divisors, whose sum is σ = 999860762820. Its totient is φ = 999860762818.

The previous prime is 999860762741. The next prime is 999860762821. The reversal of 999860762819 is 918267068999.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999860762819 is a prime.

It is a super-2 number, since 2×999860762819² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 999860762821, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (699860762819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499930381409 + 499930381410.

It is an arithmetic number, because the mean of its divisors is an integer number (499930381410).

Almost surely, 2^999860762819 is an apocalyptic number.

999860762819 is a deficient number, since it is larger than the sum of its proper divisors (1).

999860762819 is an equidigital number, since it uses as much as digits as its factorization.

999860762819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 211631616, while the sum is 74.

The spelling of 999860762819 in words is "nine hundred ninety-nine billion, eight hundred sixty million, seven hundred sixty-two thousand, eight hundred nineteen".