81206714 has 4 divisors (see below), whose sum is σ = 121810074. Its totient is φ = 40603356.

The previous prime is 81206693. The next prime is 81206737. The reversal of 81206714 is 41760218.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41760218 = 2 ⋅20880109.

It can be written as a sum of positive squares in only one way, i.e., 55875625 + 25331089 = 7475^2 + 5033^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20301677 + ... + 20301680.

Almost surely, 2^81206714 is an apocalyptic number.

81206714 is a deficient number, since it is larger than the sum of its proper divisors (40603360).

81206714 is a wasteful number, since it uses less digits than its factorization.

81206714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40603359.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 81206714 is about 9011.4767935117. The cubic root of 81206714 is about 433.0426240826.

The spelling of 81206714 in words is "eighty-one million, two hundred six thousand, seven hundred fourteen".