81714559 has 4 divisors (see below), whose sum is σ = 82081216. Its totient is φ = 81347904.

The previous prime is 81714557. The next prime is 81714569. The reversal of 81714559 is 95541718.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 81714559 - 2¹ = 81714557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81714551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182994 + ... + 183439.

It is an arithmetic number, because the mean of its divisors is an integer number (20520304).

Almost surely, 2^81714559 is an apocalyptic number.

81714559 is a deficient number, since it is larger than the sum of its proper divisors (366657).

81714559 is a wasteful number, since it uses less digits than its factorization.

81714559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366656.

The product of its digits is 50400, while the sum is 40.

The square root of 81714559 is about 9039.6105557706. The cubic root of 81714559 is about 433.9434596154.

It can be divided in two parts, 817 and 14559, that added together give a square (15376 = 124²).

The spelling of 81714559 in words is "eighty-one million, seven hundred fourteen thousand, five hundred fifty-nine".