27860641 has 2 divisors, whose sum is σ = 27860642. Its totient is φ = 27860640.

The previous prime is 27860639. The next prime is 27860647. The reversal of 27860641 is 14606872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18740241 + 9120400 = 4329^2 + 3020^2 .

It is a cyclic number.

It is not a de Polignac number, because 27860641 - 2¹ = 27860639 is a prime.

Together with 27860639, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 27860597 and 27860606.

It is not a weakly prime, because it can be changed into another prime (27860647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13930320 + 13930321.

It is an arithmetic number, because the mean of its divisors is an integer number (13930321).

Almost surely, 2^27860641 is an apocalyptic number.

It is an amenable number.

27860641 is a deficient number, since it is larger than the sum of its proper divisors (1).

27860641 is an equidigital number, since it uses as much as digits as its factorization.

27860641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 27860641 is about 5278.3180086084. The cubic root of 27860641 is about 303.1542781229.

The spelling of 27860641 in words is "twenty-seven million, eight hundred sixty thousand, six hundred forty-one".