27984157 has 2 divisors, whose sum is σ = 27984158. Its totient is φ = 27984156.

The previous prime is 27984127. The next prime is 27984163. The reversal of 27984157 is 75148972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27102436 + 881721 = 5206^2 + 939^2 .

It is a cyclic number.

It is not a de Polignac number, because 27984157 - 2¹¹ = 27982109 is a prime.

It is a super-2 number, since 2×27984157² = 1566226086001298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27984127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13992078 + 13992079.

It is an arithmetic number, because the mean of its divisors is an integer number (13992079).

Almost surely, 2^27984157 is an apocalyptic number.

It is an amenable number.

27984157 is a deficient number, since it is larger than the sum of its proper divisors (1).

27984157 is an equidigital number, since it uses as much as digits as its factorization.

27984157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 43.

The square root of 27984157 is about 5290.0053875209. The cubic root of 27984157 is about 303.6016141452.

The spelling of 27984157 in words is "twenty-seven million, nine hundred eighty-four thousand, one hundred fifty-seven".