27638473 has 2 divisors, whose sum is σ = 27638474. Its totient is φ = 27638472.

The previous prime is 27638467. The next prime is 27638489. The reversal of 27638473 is 37483672.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16024009 + 11614464 = 4003^2 + 3408^2 .

It is a cyclic number.

It is not a de Polignac number, because 27638473 - 2⁵ = 27638441 is a prime.

It is a super-3 number, since 3×27638473³ (a number of 23 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (27638423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13819236 + 13819237.

It is an arithmetic number, because the mean of its divisors is an integer number (13819237).

Almost surely, 2^27638473 is an apocalyptic number.

It is an amenable number.

27638473 is a deficient number, since it is larger than the sum of its proper divisors (1).

27638473 is an equidigital number, since it uses as much as digits as its factorization.

27638473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 40.

The square root of 27638473 is about 5257.2305446880. The cubic root of 27638473 is about 302.3463163069.

It can be divided in two parts, 2763 and 8473, that added together give a square (11236 = 106²).

The spelling of 27638473 in words is "twenty-seven million, six hundred thirty-eight thousand, four hundred seventy-three".