81013714 has 4 divisors (see below), whose sum is σ = 121520574. Its totient is φ = 40506856.

The previous prime is 81013703. The next prime is 81013741. The reversal of 81013714 is 41731018.

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., 77528025 + 3485689 = 8805^2 + 1867^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20253427 + ... + 20253430.

Almost surely, 2^81013714 is an apocalyptic number.

81013714 is a deficient number, since it is larger than the sum of its proper divisors (40506860).

81013714 is a wasteful number, since it uses less digits than its factorization.

81013714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40506859.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 81013714 is about 9000.7618566430. The cubic root of 81013714 is about 432.6992882459.

The spelling of 81013714 in words is "eighty-one million, thirteen thousand, seven hundred fourteen".