9999929 has 2 divisors, whose sum is σ = 9999930. Its totient is φ = 9999928.

The previous prime is 9999907. The next prime is 9999931. The reversal of 9999929 is 9299999.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7689529 + 2310400 = 2773^2 + 1520^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9999929 is a prime.

Together with 9999931, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9996929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999964 + 4999965.

It is an arithmetic number, because the mean of its divisors is an integer number (4999965).

Almost surely, 2^9999929 is an apocalyptic number.

It is an amenable number.

9999929 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999929 is an equidigital number, since it uses as much as digits as its factorization.

9999929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1062882, while the sum is 56.

The square root of 9999929 is about 3162.2664340628. The cubic root of 9999929 is about 215.4429591191.

It can be divided in two parts, 999992 and 9, that added together give a palindrome (1000001).

The spelling of 9999929 in words is "nine million, nine hundred ninety-nine thousand, nine hundred twenty-nine".