81708014 has 4 divisors (see below), whose sum is σ = 122562024. Its totient is φ = 40854006.

The previous prime is 81707987. The next prime is 81708059. The reversal of 81708014 is 41080718.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20427002 + ... + 20427005.

It is an arithmetic number, because the mean of its divisors is an integer number (30640506).

Almost surely, 2^81708014 is an apocalyptic number.

81708014 is a deficient number, since it is larger than the sum of its proper divisors (40854010).

81708014 is a wasteful number, since it uses less digits than its factorization.

81708014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40854009.

The product of its (nonzero) digits is 1792, while the sum is 29.

The square root of 81708014 is about 9039.2485307132. The cubic root of 81708014 is about 433.9318736107.

The spelling of 81708014 in words is "eighty-one million, seven hundred eight thousand, fourteen".