81714356 has 6 divisors (see below), whose sum is σ = 143000130. Its totient is φ = 40857176.

The previous prime is 81714337. The next prime is 81714403. The reversal of 81714356 is 65341718.

It can be written as a sum of positive squares in only one way, i.e., 78925456 + 2788900 = 8884^2 + 1670^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10214291 + ... + 10214298.

It is an arithmetic number, because the mean of its divisors is an integer number (23833355).

Almost surely, 2^81714356 is an apocalyptic number.

It is an amenable number.

81714356 is a deficient number, since it is larger than the sum of its proper divisors (61285774).

81714356 is a wasteful number, since it uses less digits than its factorization.

81714356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20428593 (or 20428591 counting only the distinct ones).

The product of its digits is 20160, while the sum is 35.

The square root of 81714356 is about 9039.5993274038. The cubic root of 81714356 is about 433.9431002726.

The spelling of 81714356 in words is "eighty-one million, seven hundred fourteen thousand, three hundred fifty-six".