84939861 has 16 divisors (see below), whose sum is σ = 119887040. Its totient is φ = 53343360.

The previous prime is 84939859. The next prime is 84939887. The reversal of 84939861 is 16893948.

It is not a de Polignac number, because 84939861 - 2¹ = 84939859 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 84939861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84939961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6201 + ... + 14433.

It is an arithmetic number, because the mean of its divisors is an integer number (7492940).

Almost surely, 2^84939861 is an apocalyptic number.

It is an amenable number.

84939861 is a deficient number, since it is larger than the sum of its proper divisors (34947179).

84939861 is a wasteful number, since it uses less digits than its factorization.

84939861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8436.

The product of its digits is 373248, while the sum is 48.

The square root of 84939861 is about 9216.2823849967. The cubic root of 84939861 is about 439.5792482648.

The spelling of 84939861 in words is "eighty-four million, nine hundred thirty-nine thousand, eight hundred sixty-one".