27949973 has 2 divisors, whose sum is σ = 27949974. Its totient is φ = 27949972.

The previous prime is 27949951. The next prime is 27950047. The reversal of 27949973 is 37994972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19695844 + 8254129 = 4438^2 + 2873^2 .

It is a cyclic number.

It is not a de Polignac number, because 27949973 - 2¹² = 27945877 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27949373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13974986 + 13974987.

It is an arithmetic number, because the mean of its divisors is an integer number (13974987).

Almost surely, 2^27949973 is an apocalyptic number.

It is an amenable number.

27949973 is a deficient number, since it is larger than the sum of its proper divisors (1).

27949973 is an equidigital number, since it uses as much as digits as its factorization.

27949973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 857304, while the sum is 50.

The square root of 27949973 is about 5286.7734016127. The cubic root of 27949973 is about 303.4779424272.

The spelling of 27949973 in words is "twenty-seven million, nine hundred forty-nine thousand, nine hundred seventy-three".