27971633 has 2 divisors, whose sum is σ = 27971634. Its totient is φ = 27971632.

The previous prime is 27971569. The next prime is 27971653. The reversal of 27971633 is 33617972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27583504 + 388129 = 5252^2 + 623^2 .

It is a cyclic number.

It is not a de Polignac number, because 27971633 - 2⁶ = 27971569 is a prime.

It is not a weakly prime, because it can be changed into another prime (27971653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13985816 + 13985817.

It is an arithmetic number, because the mean of its divisors is an integer number (13985817).

Almost surely, 2^27971633 is an apocalyptic number.

It is an amenable number.

27971633 is a deficient number, since it is larger than the sum of its proper divisors (1).

27971633 is an equidigital number, since it uses as much as digits as its factorization.

27971633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47628, while the sum is 38.

The square root of 27971633 is about 5288.8215133430. The cubic root of 27971633 is about 303.5563162053.

The spelling of 27971633 in words is "twenty-seven million, nine hundred seventy-one thousand, six hundred thirty-three".