81714737 has 4 divisors (see below), whose sum is σ = 88000500. Its totient is φ = 75428976.

The previous prime is 81714719. The next prime is 81714761. The reversal of 81714737 is 73741718.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7134241 + 74580496 = 2671^2 + 8636^2 .

It is a cyclic number.

It is not a de Polignac number, because 81714737 - 2¹⁶ = 81649201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 81714737.

It is not an unprimeable number, because it can be changed into a prime (81714797) 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, 3142862 + ... + 3142887.

It is an arithmetic number, because the mean of its divisors is an integer number (22000125).

Almost surely, 2^81714737 is an apocalyptic number.

It is an amenable number.

81714737 is a deficient number, since it is larger than the sum of its proper divisors (6285763).

81714737 is a wasteful number, since it uses less digits than its factorization.

81714737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6285762.

The product of its digits is 32928, while the sum is 38.

The square root of 81714737 is about 9039.6204013222. The cubic root of 81714737 is about 433.9437747036.

The spelling of 81714737 in words is "eighty-one million, seven hundred fourteen thousand, seven hundred thirty-seven".