84861637 has 16 divisors (see below), whose sum is σ = 103064832. Its totient is φ = 68209920.

The previous prime is 84861631. The next prime is 84861653. The reversal of 84861637 is 73616848.

It is a cyclic number.

It is not a de Polignac number, because 84861637 - 2¹⁹ = 84337349 is a prime.

It is a super-3 number, since 3×84861637³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 84861593 and 84861602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84861631) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 35863 + ... + 38155.

It is an arithmetic number, because the mean of its divisors is an integer number (6441552).

Almost surely, 2^84861637 is an apocalyptic number.

It is an amenable number.

84861637 is a deficient number, since it is larger than the sum of its proper divisors (18203195).

84861637 is a wasteful number, since it uses less digits than its factorization.

84861637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2628.

The product of its digits is 193536, while the sum is 43.

The square root of 84861637 is about 9212.0376139050. The cubic root of 84861637 is about 439.4442656715. Note that the first 3 decimals are identical.

The spelling of 84861637 in words is "eighty-four million, eight hundred sixty-one thousand, six hundred thirty-seven".