27783641 has 2 divisors, whose sum is σ = 27783642. Its totient is φ = 27783640.

The previous prime is 27783617. The next prime is 27783647. The reversal of 27783641 is 14638772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27457600 + 326041 = 5240^2 + 571^2 .

It is a cyclic number.

It is not a de Polignac number, because 27783641 - 2⁶ = 27783577 is a prime.

It is equal to p_1728839 and since 27783641 and 1728839 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 27783595 and 27783604.

It is not a weakly prime, because it can be changed into another prime (27783647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13891820 + 13891821.

It is an arithmetic number, because the mean of its divisors is an integer number (13891821).

Almost surely, 2^27783641 is an apocalyptic number.

It is an amenable number.

27783641 is a deficient number, since it is larger than the sum of its proper divisors (1).

27783641 is an equidigital number, since it uses as much as digits as its factorization.

27783641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 38.

The square root of 27783641 is about 5271.0189716980. The cubic root of 27783641 is about 302.8747390033.

The spelling of 27783641 in words is "twenty-seven million, seven hundred eighty-three thousand, six hundred forty-one".