81029714 has 4 divisors (see below), whose sum is σ = 121544574. Its totient is φ = 40514856.

The previous prime is 81029681. The next prime is 81029717. The reversal of 81029714 is 41792018.

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

It can be written as a sum of positive squares in only one way, i.e., 64080025 + 16949689 = 8005^2 + 4117^2 .

It is not an unprimeable number, because it can be changed into a prime (81029717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20257427 + ... + 20257430.

Almost surely, 2^81029714 is an apocalyptic number.

81029714 is a deficient number, since it is larger than the sum of its proper divisors (40514860).

81029714 is a wasteful number, since it uses less digits than its factorization.

81029714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40514859.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 81029714 is about 9001.6506264129. The cubic root of 81029714 is about 432.7277720360.

Subtracting from 81029714 its reverse (41792018), we obtain a square (39237696 = 6264²).

The spelling of 81029714 in words is "eighty-one million, twenty-nine thousand, seven hundred fourteen".