999259979 has 2 divisors, whose sum is σ = 999259980. Its totient is φ = 999259978.

The previous prime is 999259973. The next prime is 999260011. The reversal of 999259979 is 979952999.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999259979 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (999259973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499629989 + 499629990.

It is an arithmetic number, because the mean of its divisors is an integer number (499629990).

Almost surely, 2^999259979 is an apocalyptic number.

999259979 is a deficient number, since it is larger than the sum of its proper divisors (1).

999259979 is an equidigital number, since it uses as much as digits as its factorization.

999259979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37200870, while the sum is 68.

The square root of 999259979 is about 31611.0736767988. The cubic root of 999259979 is about 999.7532654604.

The spelling of 999259979 in words is "nine hundred ninety-nine million, two hundred fifty-nine thousand, nine hundred seventy-nine".