27965075243 has 4 divisors (see below), whose sum is σ = 31960086000. Its totient is φ = 23970064488.

The previous prime is 27965075239. The next prime is 27965075263. The reversal of 27965075243 is 34257056972.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27965075243 - 2² = 27965075239 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27965075191 and 27965075200.

It is not an unprimeable number, because it can be changed into a prime (27965075263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1997505368 + ... + 1997505381.

It is an arithmetic number, because the mean of its divisors is an integer number (7990021500).

Almost surely, 2^27965075243 is an apocalyptic number.

27965075243 is a deficient number, since it is larger than the sum of its proper divisors (3995010757).

27965075243 is an equidigital number, since it uses as much as digits as its factorization.

27965075243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3995010756.

The product of its (nonzero) digits is 3175200, while the sum is 50.

The spelling of 27965075243 in words is "twenty-seven billion, nine hundred sixty-five million, seventy-five thousand, two hundred forty-three".