999859379 has 2 divisors, whose sum is σ = 999859380. Its totient is φ = 999859378.

The previous prime is 999859373. The next prime is 999859447. The reversal of 999859379 is 973958999.

It is an a-pointer prime, because the next prime (999859447) can be obtained adding 999859379 to its sum of digits (68).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999859379 - 2⁸ = 999859123 is a prime.

It is not a weakly prime, because it can be changed into another prime (999859373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499929689 + 499929690.

It is an arithmetic number, because the mean of its divisors is an integer number (499929690).

Almost surely, 2^999859379 is an apocalyptic number.

999859379 is a deficient number, since it is larger than the sum of its proper divisors (1).

999859379 is an equidigital number, since it uses as much as digits as its factorization.

999859379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 49601160, while the sum is 68.

The square root of 999859379 is about 31620.5531102794. The cubic root of 999859379 is about 999.9531241360.

The spelling of 999859379 in words is "nine hundred ninety-nine million, eight hundred fifty-nine thousand, three hundred seventy-nine".