309687872961 has 8 divisors (see below), whose sum is σ = 414630514144. Its totient is φ = 205601906880.

The previous prime is 309687872947. The next prime is 309687872969. The reversal of 309687872961 is 169278786903.

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

It is not a de Polignac number, because 309687872961 - 2¹⁰ = 309687871937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 309687872892 and 309687872901.

It is not an unprimeable number, because it can be changed into a prime (309687872969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214167931 + ... + 214169376.

It is an arithmetic number, because the mean of its divisors is an integer number (51828814268).

Almost surely, 2^309687872961 is an apocalyptic number.

It is an amenable number.

309687872961 is a deficient number, since it is larger than the sum of its proper divisors (104942641183).

309687872961 is a wasteful number, since it uses less digits than its factorization.

309687872961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428337551.

The product of its (nonzero) digits is 54867456, while the sum is 66.

The spelling of 309687872961 in words is "three hundred nine billion, six hundred eighty-seven million, eight hundred seventy-two thousand, nine hundred sixty-one".