84970681 has 4 divisors (see below), whose sum is σ = 85214500. Its totient is φ = 84726864.

The previous prime is 84970651. The next prime is 84970729. The reversal of 84970681 is 18607948.

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 37015056 + 47955625 = 6084^2 + 6925^2 .

It is a cyclic number.

It is not a de Polignac number, because 84970681 - 2²³ = 76582073 is a prime.

It is a super-2 number, since 2×84970681² = 14440033259207522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84970601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121386 + ... + 122083.

It is an arithmetic number, because the mean of its divisors is an integer number (21303625).

Almost surely, 2^84970681 is an apocalyptic number.

It is an amenable number.

84970681 is a deficient number, since it is larger than the sum of its proper divisors (243819).

84970681 is a wasteful number, since it uses less digits than its factorization.

84970681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243818.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 84970681 is about 9217.9542741326. The cubic root of 84970681 is about 439.6324082065.

The spelling of 84970681 in words is "eighty-four million, nine hundred seventy thousand, six hundred eighty-one".