9999999379 has 2 divisors, whose sum is σ = 9999999380. Its totient is φ = 9999999378.

The previous prime is 9999999371. The next prime is 9999999479. The reversal of 9999999379 is 9739999999.

It is a weak prime.

It is an emirp because it is prime and its reverse (9739999999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9999999379 - 2³ = 9999999371 is a prime.

It is not a weakly prime, because it can be changed into another prime (9999999371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999999689 + 4999999690.

It is an arithmetic number, because the mean of its divisors is an integer number (4999999690).

Almost surely, 2^9999999379 is an apocalyptic number.

9999999379 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999999379 is an equidigital number, since it uses as much as digits as its factorization.

9999999379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 903981141, while the sum is 82.

The square root of 9999999379 is about 99999.9968950000. The cubic root of 9999999379 is about 2154.4346454351.

The spelling of 9999999379 in words is "nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, three hundred seventy-nine".