27861497 has 2 divisors, whose sum is σ = 27861498. Its totient is φ = 27861496.

The previous prime is 27861479. The next prime is 27861541. The reversal of 27861497 is 79416872.

Together with previous prime (27861479) it forms an Ormiston pair, because they use the same digits, order apart.

It is an a-pointer prime, because the next prime (27861541) can be obtained adding 27861497 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23580736 + 4280761 = 4856^2 + 2069^2 .

It is a cyclic number.

It is not a de Polignac number, because 27861497 - 2⁶ = 27861433 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27861437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13930748 + 13930749.

It is an arithmetic number, because the mean of its divisors is an integer number (13930749).

Almost surely, 2^27861497 is an apocalyptic number.

It is an amenable number.

27861497 is a deficient number, since it is larger than the sum of its proper divisors (1).

27861497 is an equidigital number, since it uses as much as digits as its factorization.

27861497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 44.

The square root of 27861497 is about 5278.3990944225. The cubic root of 27861497 is about 303.1573828301.

The spelling of 27861497 in words is "twenty-seven million, eight hundred sixty-one thousand, four hundred ninety-seven".