81674827 has 12 divisors (see below), whose sum is σ = 88872120. Its totient is φ = 75024768.

The previous prime is 81674773. The next prime is 81674833. The reversal of 81674827 is 72847618.

It is a de Polignac number, because none of the positive numbers 2^k-81674827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81674227) 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 in 11 ways as a sum of consecutive naturals, for example, 37299 + ... + 39427.

It is an arithmetic number, because the mean of its divisors is an integer number (7406010).

Almost surely, 2^81674827 is an apocalyptic number.

81674827 is a deficient number, since it is larger than the sum of its proper divisors (7197293).

81674827 is a wasteful number, since it uses less digits than its factorization.

81674827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2382 (or 2369 counting only the distinct ones).

The product of its digits is 150528, while the sum is 43.

The square root of 81674827 is about 9037.4126275168. The cubic root of 81674827 is about 433.8731162276.

The spelling of 81674827 in words is "eighty-one million, six hundred seventy-four thousand, eight hundred twenty-seven".