81862027 has 8 divisors (see below), whose sum is σ = 88623360. Its totient is φ = 75167040.

The previous prime is 81861977. The next prime is 81862049. The reversal of 81862027 is 72026818.

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

It is not a de Polignac number, because 81862027 - 2¹¹ = 81859979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81861983 and 81862001.

It is not an unprimeable number, because it can be changed into a prime (81862057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14002 + ... + 18967.

It is an arithmetic number, because the mean of its divisors is an integer number (11077920).

Almost surely, 2^81862027 is an apocalyptic number.

81862027 is a deficient number, since it is larger than the sum of its proper divisors (6761333).

81862027 is a wasteful number, since it uses less digits than its factorization.

81862027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33173.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 81862027 is about 9047.7636463382. The cubic root of 81862027 is about 434.2043446527.

The spelling of 81862027 in words is "eighty-one million, eight hundred sixty-two thousand, twenty-seven".