309788949905 has 8 divisors (see below), whose sum is σ = 372031175232. Its totient is φ = 247641536368.

The previous prime is 309788949863. The next prime is 309788949941. The reversal of 309788949905 is 509949887903.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 309788949905 - 2¹⁰ = 309788948881 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23695757 + ... + 23708826.

It is an arithmetic number, because the mean of its divisors is an integer number (46503896904).

Almost surely, 2^309788949905 is an apocalyptic number.

It is an amenable number.

309788949905 is a deficient number, since it is larger than the sum of its proper divisors (62242225327).

309788949905 is a wasteful number, since it uses less digits than its factorization.

309788949905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47405895.

The product of its (nonzero) digits is 176359680, while the sum is 71.

The spelling of 309788949905 in words is "three hundred nine billion, seven hundred eighty-eight million, nine hundred forty-nine thousand, nine hundred five".