81076874 has 8 divisors (see below), whose sum is σ = 122503428. Its totient is φ = 40242400.

The previous prime is 81076867. The next prime is 81076889. The reversal of 81076874 is 47867018.

It can be written as a sum of positive squares in 2 ways, for example, as 72982849 + 8094025 = 8543^2 + 2845^2 .

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

It is a super-2 number, since 2×81076874² = 13146918995223752, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 147677 + ... + 148224.

Almost surely, 2^81076874 is an apocalyptic number.

81076874 is a deficient number, since it is larger than the sum of its proper divisors (41426554).

81076874 is a wasteful number, since it uses less digits than its factorization.

81076874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296040.

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 81076874 is about 9004.2697649504. The cubic root of 81076874 is about 432.8117062000.

The spelling of 81076874 in words is "eighty-one million, seventy-six thousand, eight hundred seventy-four".