81727076 has 24 divisors (see below), whose sum is σ = 144842040. Its totient is φ = 40347392.

The previous prime is 81727033. The next prime is 81727091. The reversal of 81727076 is 67072718.

It can be written as a sum of positive squares in 4 ways, for example, as 48664576 + 33062500 = 6976^2 + 5750^2 .

It is a super-3 number, since 3×81727076³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160310 + ... + 160818.

It is an arithmetic number, because the mean of its divisors is an integer number (6035085).

Almost surely, 2^81727076 is an apocalyptic number.

It is an amenable number.

81727076 is a deficient number, since it is larger than the sum of its proper divisors (63114964).

81727076 is a wasteful number, since it uses less digits than its factorization.

81727076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943 (or 941 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 38.

The square root of 81727076 is about 9040.3028710326. The cubic root of 81727076 is about 433.9656155732.

The spelling of 81727076 in words is "eighty-one million, seven hundred twenty-seven thousand, seventy-six".