8129907 has 6 divisors (see below), whose sum is σ = 11743212. Its totient is φ = 5419932.

The previous prime is 8129903. The next prime is 8129909. The reversal of 8129907 is 7099218.

It is a happy number.

It is not a de Polignac number, because 8129907 - 2² = 8129903 is a prime.

8129907 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8129903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 451653 + ... + 451670.

It is an arithmetic number, because the mean of its divisors is an integer number (1957202).

Almost surely, 2^8129907 is an apocalyptic number.

8129907 is a deficient number, since it is larger than the sum of its proper divisors (3613305).

8129907 is a wasteful number, since it uses less digits than its factorization.

8129907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903329 (or 903326 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 8129907 is about 2851.2991775680. The cubic root of 8129907 is about 201.0767509670.

The spelling of 8129907 in words is "eight million, one hundred twenty-nine thousand, nine hundred seven".