84852781 has 4 divisors (see below), whose sum is σ = 91379932. Its totient is φ = 78325632.

The previous prime is 84852751. The next prime is 84852799. The reversal of 84852781 is 18725848.

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 19096900 + 65755881 = 4370^2 + 8109^2 .

It is a cyclic number.

It is not a de Polignac number, because 84852781 - 2⁷ = 84852653 is a prime.

It is a super-2 number, since 2×84852781² = 14399988886867922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84852701) 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, 3263556 + ... + 3263581.

It is an arithmetic number, because the mean of its divisors is an integer number (22844983).

Almost surely, 2^84852781 is an apocalyptic number.

It is an amenable number.

84852781 is a deficient number, since it is larger than the sum of its proper divisors (6527151).

84852781 is a wasteful number, since it uses less digits than its factorization.

84852781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6527150.

The product of its digits is 143360, while the sum is 43.

The square root of 84852781 is about 9211.5569259491. The cubic root of 84852781 is about 439.4289786154.

The spelling of 84852781 in words is "eighty-four million, eight hundred fifty-two thousand, seven hundred eighty-one".