27865973 has 2 divisors, whose sum is σ = 27865974. Its totient is φ = 27865972.

The previous prime is 27865909. The next prime is 27865987. The reversal of 27865973 is 37956872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25020004 + 2845969 = 5002^2 + 1687^2 .

It is a cyclic number.

It is not a de Polignac number, because 27865973 - 2⁶ = 27865909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27865073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13932986 + 13932987.

It is an arithmetic number, because the mean of its divisors is an integer number (13932987).

Almost surely, 2^27865973 is an apocalyptic number.

It is an amenable number.

27865973 is a deficient number, since it is larger than the sum of its proper divisors (1).

27865973 is an equidigital number, since it uses as much as digits as its factorization.

27865973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 47.

The square root of 27865973 is about 5278.8230695866. The cubic root of 27865973 is about 303.1736162219.

The spelling of 27865973 in words is "twenty-seven million, eight hundred sixty-five thousand, nine hundred seventy-three".