27956161 has 2 divisors, whose sum is σ = 27956162. Its totient is φ = 27956160.

The previous prime is 27956119. The next prime is 27956171. The reversal of 27956161 is 16165972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27625536 + 330625 = 5256^2 + 575^2 .

It is a cyclic number.

It is not a de Polignac number, because 27956161 - 2¹⁵ = 27923393 is a prime.

It is equal to p_1738873 and since 27956161 and 1738873 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27956161.

It is not a weakly prime, because it can be changed into another prime (27956171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13978080 + 13978081.

It is an arithmetic number, because the mean of its divisors is an integer number (13978081).

Almost surely, 2^27956161 is an apocalyptic number.

It is an amenable number.

27956161 is a deficient number, since it is larger than the sum of its proper divisors (1).

27956161 is an equidigital number, since it uses as much as digits as its factorization.

27956161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 37.

The square root of 27956161 is about 5287.3586033104. The cubic root of 27956161 is about 303.5003369979.

The spelling of 27956161 in words is "twenty-seven million, nine hundred fifty-six thousand, one hundred sixty-one".