27966973 has 2 divisors, whose sum is σ = 27966974. Its totient is φ = 27966972.

The previous prime is 27966947. The next prime is 27966979. The reversal of 27966973 is 37966972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22686169 + 5280804 = 4763^2 + 2298^2 .

It is a cyclic number.

It is not a de Polignac number, because 27966973 - 2⁵ = 27966941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27966979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13983486 + 13983487.

It is an arithmetic number, because the mean of its divisors is an integer number (13983487).

Almost surely, 2^27966973 is an apocalyptic number.

It is an amenable number.

27966973 is a deficient number, since it is larger than the sum of its proper divisors (1).

27966973 is an equidigital number, since it uses as much as digits as its factorization.

27966973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 857304, while the sum is 49.

The square root of 27966973 is about 5288.3809431621. The cubic root of 27966973 is about 303.5394580429.

Subtracting 27966973 from its reverse (37966972), we obtain a palindrome (9999999).

The spelling of 27966973 in words is "twenty-seven million, nine hundred sixty-six thousand, nine hundred seventy-three".