27931223809 has 8 divisors (see below), whose sum is σ = 29403140480. Its totient is φ = 26459492400.

The previous prime is 27931223783. The next prime is 27931223857. The reversal of 27931223809 is 90832213972.

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 27931223809 - 2¹⁷ = 27931092737 is a prime.

It is a super-3 number, since 3×27931223809³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27931223869) 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 7 ways as a sum of consecutive naturals, for example, 350344 + ... + 422614.

It is an arithmetic number, because the mean of its divisors is an integer number (3675392560).

Almost surely, 2^27931223809 is an apocalyptic number.

It is an amenable number.

27931223809 is a deficient number, since it is larger than the sum of its proper divisors (1471916671).

27931223809 is a wasteful number, since it uses less digits than its factorization.

27931223809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92631.

The product of its (nonzero) digits is 326592, while the sum is 46.

The spelling of 27931223809 in words is "twenty-seven billion, nine hundred thirty-one million, two hundred twenty-three thousand, eight hundred nine".