81303874 has 16 divisors (see below), whose sum is σ = 126479808. Its totient is φ = 39165552.

The previous prime is 81303853. The next prime is 81303899. The reversal of 81303874 is 47830318.

It is a super-3 number, since 3×81303874³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2289 + ... + 12955.

It is an arithmetic number, because the mean of its divisors is an integer number (7904988).

Almost surely, 2^81303874 is an apocalyptic number.

81303874 is a deficient number, since it is larger than the sum of its proper divisors (45175934).

81303874 is a wasteful number, since it uses less digits than its factorization.

81303874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10809.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 81303874 is about 9016.8660852871. The cubic root of 81303874 is about 433.2152602700.

The spelling of 81303874 in words is "eighty-one million, three hundred three thousand, eight hundred seventy-four".