81286627 has 2 divisors, whose sum is σ = 81286628. Its totient is φ = 81286626.

The previous prime is 81286613. The next prime is 81286643. The reversal of 81286627 is 72668218.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81286627 - 2¹¹ = 81284579 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 81286627.

It is not a weakly prime, because it can be changed into another prime (81286687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40643313 + 40643314.

It is an arithmetic number, because the mean of its divisors is an integer number (40643314).

Almost surely, 2^81286627 is an apocalyptic number.

81286627 is a deficient number, since it is larger than the sum of its proper divisors (1).

81286627 is an equidigital number, since it uses as much as digits as its factorization.

81286627 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 40.

The square root of 81286627 is about 9015.9096601508. The cubic root of 81286627 is about 433.1846254363.

The spelling of 81286627 in words is "eighty-one million, two hundred eighty-six thousand, six hundred twenty-seven".