27680831 has 2 divisors, whose sum is σ = 27680832. Its totient is φ = 27680830.

The previous prime is 27680813. The next prime is 27680837. The reversal of 27680831 is 13808672.

Together with previous prime (27680813) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27680831 is a prime.

It is a super-2 number, since 2×27680831² = 1532456809701122, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 27680791 and 27680800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27680837) 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, 13840415 + 13840416.

It is an arithmetic number, because the mean of its divisors is an integer number (13840416).

Almost surely, 2^27680831 is an apocalyptic number.

27680831 is a deficient number, since it is larger than the sum of its proper divisors (1).

27680831 is an equidigital number, since it uses as much as digits as its factorization.

27680831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 27680831 is about 5261.2575492937. The cubic root of 27680831 is about 302.5006934847.

The spelling of 27680831 in words is "twenty-seven million, six hundred eighty thousand, eight hundred thirty-one".