81079834 has 16 divisors (see below), whose sum is σ = 140481216. Its totient is φ = 34686400.

The previous prime is 81079753. The next prime is 81079861. The reversal of 81079834 is 43897018.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 108022 + ... + 108769.

It is an arithmetic number, because the mean of its divisors is an integer number (8780076).

Almost surely, 2^81079834 is an apocalyptic number.

81079834 is a deficient number, since it is larger than the sum of its proper divisors (59401382).

81079834 is a wasteful number, since it uses less digits than its factorization.

81079834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216821.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 81079834 is about 9004.4341299162. The cubic root of 81079834 is about 432.8169732468.

The spelling of 81079834 in words is "eighty-one million, seventy-nine thousand, eight hundred thirty-four".