81726874 has 8 divisors (see below), whose sum is σ = 122870880. Its totient is φ = 40769916.

The previous prime is 81726851. The next prime is 81726907. The reversal of 81726874 is 47862718.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 81726874.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45664 + ... + 47419.

It is an arithmetic number, because the mean of its divisors is an integer number (15358860).

Almost surely, 2^81726874 is an apocalyptic number.

81726874 is a deficient number, since it is larger than the sum of its proper divisors (41144006).

81726874 is a wasteful number, since it uses less digits than its factorization.

81726874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93524.

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

The square root of 81726874 is about 9040.2916988336. The cubic root of 81726874 is about 433.9652580371.

The spelling of 81726874 in words is "eighty-one million, seven hundred twenty-six thousand, eight hundred seventy-four".