27774913 has 2 divisors, whose sum is σ = 27774914. Its totient is φ = 27774912.

The previous prime is 27774911. The next prime is 27774919. The reversal of 27774913 is 31947772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15186609 + 12588304 = 3897^2 + 3548^2 .

It is a cyclic number.

It is not a de Polignac number, because 27774913 - 2¹ = 27774911 is a prime.

Together with 27774911, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (27774911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13887456 + 13887457.

It is an arithmetic number, because the mean of its divisors is an integer number (13887457).

Almost surely, 2^27774913 is an apocalyptic number.

It is an amenable number.

27774913 is a deficient number, since it is larger than the sum of its proper divisors (1).

27774913 is an equidigital number, since it uses as much as digits as its factorization.

27774913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 74088, while the sum is 40.

The square root of 27774913 is about 5270.1909832567. The cubic root of 27774913 is about 302.8430204874.

The spelling of 27774913 in words is "twenty-seven million, seven hundred seventy-four thousand, nine hundred thirteen".