81627874 has 12 divisors (see below), whose sum is σ = 127998486. Its totient is φ = 39038912.

The previous prime is 81627787. The next prime is 81627881. The reversal of 81627874 is 47872618.

It can be written as a sum of positive squares in only one way, i.e., 61512649 + 20115225 = 7843^2 + 4485^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 81627874.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37519 + ... + 39634.

Almost surely, 2^81627874 is an apocalyptic number.

81627874 is a deficient number, since it is larger than the sum of its proper divisors (46370612).

81627874 is a wasteful number, since it uses less digits than its factorization.

81627874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77201 (or 77178 counting only the distinct ones).

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

The square root of 81627874 is about 9034.8145526070. The cubic root of 81627874 is about 433.7899590291.

The spelling of 81627874 in words is "eighty-one million, six hundred twenty-seven thousand, eight hundred seventy-four".