81627683 has 2 divisors, whose sum is σ = 81627684. Its totient is φ = 81627682.

The previous prime is 81627677. The next prime is 81627691. The reversal of 81627683 is 38672618.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81627683 - 2¹² = 81623587 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 81627683.

It is not a weakly prime, because it can be changed into another prime (81627643) 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, 40813841 + 40813842.

It is an arithmetic number, because the mean of its divisors is an integer number (40813842).

Almost surely, 2^81627683 is an apocalyptic number.

81627683 is a deficient number, since it is larger than the sum of its proper divisors (1).

81627683 is an equidigital number, since it uses as much as digits as its factorization.

81627683 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 41.

The square root of 81627683 is about 9034.8039823784. The cubic root of 81627683 is about 433.7896206890.

The spelling of 81627683 in words is "eighty-one million, six hundred twenty-seven thousand, six hundred eighty-three".