27970933 has 4 divisors (see below), whose sum is σ = 29616300. Its totient is φ = 26325568.

The previous prime is 27970931. The next prime is 27970937. The reversal of 27970933 is 33907972.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15311569 + 12659364 = 3913^2 + 3558^2 .

It is a cyclic number.

It is not a de Polignac number, because 27970933 - 2¹ = 27970931 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27970931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 822658 + ... + 822691.

It is an arithmetic number, because the mean of its divisors is an integer number (7404075).

Almost surely, 2^27970933 is an apocalyptic number.

It is an amenable number.

27970933 is a deficient number, since it is larger than the sum of its proper divisors (1645367).

27970933 is a wasteful number, since it uses less digits than its factorization.

27970933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1645366.

The product of its (nonzero) digits is 71442, while the sum is 40.

The square root of 27970933 is about 5288.7553356154. The cubic root of 27970933 is about 303.5537839829.

The spelling of 27970933 in words is "twenty-seven million, nine hundred seventy thousand, nine hundred thirty-three".