999876613 has 2 divisors, whose sum is σ = 999876614. Its totient is φ = 999876612.

The previous prime is 999876611. The next prime is 999876671. The reversal of 999876613 is 316678999.

It is an a-pointer prime, because the next prime (999876671) can be obtained adding 999876613 to its sum of digits (58).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 858314209 + 141562404 = 29297^2 + 11898^2 .

It is a cyclic number.

It is not a de Polignac number, because 999876613 - 2¹ = 999876611 is a prime.

Together with 999876611, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999876611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499938306 + 499938307.

It is an arithmetic number, because the mean of its divisors is an integer number (499938307).

Almost surely, 2^999876613 is an apocalyptic number.

It is an amenable number.

999876613 is a deficient number, since it is larger than the sum of its proper divisors (1).

999876613 is an equidigital number, since it uses as much as digits as its factorization.

999876613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4408992, while the sum is 58.

The square root of 999876613 is about 31620.8256217323. The cubic root of 999876613 is about 999.9588693083.

The spelling of 999876613 in words is "nine hundred ninety-nine million, eight hundred seventy-six thousand, six hundred thirteen".