9959779 has 2 divisors, whose sum is σ = 9959780. Its totient is φ = 9959778.

The previous prime is 9959777. The next prime is 9959797. The reversal of 9959779 is 9779599.

Together with next prime (9959797) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9959779 - 2¹ = 9959777 is a prime.

Together with 9959777, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (9959777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4979889 + 4979890.

It is an arithmetic number, because the mean of its divisors is an integer number (4979890).

Almost surely, 2^9959779 is an apocalyptic number.

9959779 is a deficient number, since it is larger than the sum of its proper divisors (1).

9959779 is an equidigital number, since it uses as much as digits as its factorization.

9959779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1607445, while the sum is 55.

The square root of 9959779 is about 3155.9117541528. The cubic root of 9959779 is about 215.1542358221.

The spelling of 9959779 in words is "nine million, nine hundred fifty-nine thousand, seven hundred seventy-nine".