308129913 has 80 divisors (see below), whose sum is σ = 600082560. Its totient is φ = 152907264.

The previous prime is 308129911. The next prime is 308129917. The reversal of 308129913 is 319921803.

It is not a de Polignac number, because 308129913 - 2¹ = 308129911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308129911) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 124078 + ... + 126536.

It is an arithmetic number, because the mean of its divisors is an integer number (7501032).

Almost surely, 2^308129913 is an apocalyptic number.

It is an amenable number.

308129913 is a deficient number, since it is larger than the sum of its proper divisors (291952647).

308129913 is a wasteful number, since it uses less digits than its factorization.

308129913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2508 (or 2499 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 308129913 is about 17553.6296246674. The cubic root of 308129913 is about 675.4262788860.

The spelling of 308129913 in words is "three hundred eight million, one hundred twenty-nine thousand, nine hundred thirteen".