84527681 has 4 divisors (see below), whose sum is σ = 96603072. Its totient is φ = 72452292.

The previous prime is 84527657. The next prime is 84527683. The reversal of 84527681 is 18672548.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84527681 is a prime.

It is a super-2 number, since 2×84527681² = 14289857710475522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (84527683) 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, 6037685 + ... + 6037698.

It is an arithmetic number, because the mean of its divisors is an integer number (24150768).

Almost surely, 2^84527681 is an apocalyptic number.

It is an amenable number.

84527681 is a deficient number, since it is larger than the sum of its proper divisors (12075391).

84527681 is a wasteful number, since it uses less digits than its factorization.

84527681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12075390.

The product of its digits is 107520, while the sum is 41.

The square root of 84527681 is about 9193.8936800466. The cubic root of 84527681 is about 438.8670595088.

The spelling of 84527681 in words is "eighty-four million, five hundred twenty-seven thousand, six hundred eighty-one".