27999481 has 2 divisors, whose sum is σ = 27999482. Its totient is φ = 27999480.

The previous prime is 27999467. The next prime is 27999497. The reversal of 27999481 is 18499972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25160256 + 2839225 = 5016^2 + 1685^2 .

It is a cyclic number.

It is not a de Polignac number, because 27999481 - 2⁷ = 27999353 is a prime.

It is a super-2 number, since 2×27999481² = 1567941872538722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27999401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13999740 + 13999741.

It is an arithmetic number, because the mean of its divisors is an integer number (13999741).

Almost surely, 2^27999481 is an apocalyptic number.

It is an amenable number.

27999481 is a deficient number, since it is larger than the sum of its proper divisors (1).

27999481 is an equidigital number, since it uses as much as digits as its factorization.

27999481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 49.

The square root of 27999481 is about 5291.4535810116. The cubic root of 27999481 is about 303.6570209978.

The spelling of 27999481 in words is "twenty-seven million, nine hundred ninety-nine thousand, four hundred eighty-one".