27684949 has 2 divisors, whose sum is σ = 27684950. Its totient is φ = 27684948.

The previous prime is 27684947. The next prime is 27684961. The reversal of 27684949 is 94948672.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15132100 + 12552849 = 3890^2 + 3543^2 .

It is a cyclic number.

It is not a de Polignac number, because 27684949 - 2¹ = 27684947 is a prime.

It is a super-2 number, since 2×27684949² = 1532912802265202, which contains 22 as substring.

Together with 27684947, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27684947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13842474 + 13842475.

It is an arithmetic number, because the mean of its divisors is an integer number (13842475).

Almost surely, 2^27684949 is an apocalyptic number.

It is an amenable number.

27684949 is a deficient number, since it is larger than the sum of its proper divisors (1).

27684949 is an equidigital number, since it uses as much as digits as its factorization.

27684949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 49.

The square root of 27684949 is about 5261.6488860432. The cubic root of 27684949 is about 302.5156934690.

The spelling of 27684949 in words is "twenty-seven million, six hundred eighty-four thousand, nine hundred forty-nine".