27867397 has 4 divisors (see below), whose sum is σ = 28515520. Its totient is φ = 27219276.

The previous prime is 27867391. The next prime is 27867407. The reversal of 27867397 is 79376872.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27867397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27867397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27867391) 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 in 3 ways as a sum of consecutive naturals, for example, 323997 + ... + 324082.

It is an arithmetic number, because the mean of its divisors is an integer number (7128880).

Almost surely, 2^27867397 is an apocalyptic number.

It is an amenable number.

27867397 is a deficient number, since it is larger than the sum of its proper divisors (648123).

27867397 is an equidigital number, since it uses as much as digits as its factorization.

27867397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648122.

The product of its digits is 889056, while the sum is 49.

The square root of 27867397 is about 5278.9579464133. The cubic root of 27867397 is about 303.1787803681.

The spelling of 27867397 in words is "twenty-seven million, eight hundred sixty-seven thousand, three hundred ninety-seven".