84907861 has 8 divisors (see below), whose sum is σ = 85944600. Its totient is φ = 83876352.

The previous prime is 84907847. The next prime is 84907871. The reversal of 84907861 is 16870948.

It can be written as a sum of positive squares in 4 ways, for example, as 378225 + 84529636 = 615^2 + 9194^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 84907861 - 2⁵ = 84907829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84907831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38361 + ... + 40513.

It is an arithmetic number, because the mean of its divisors is an integer number (10743075).

Almost surely, 2^84907861 is an apocalyptic number.

It is an amenable number.

84907861 is a deficient number, since it is larger than the sum of its proper divisors (1036739).

84907861 is a wasteful number, since it uses less digits than its factorization.

84907861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2615.

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

The square root of 84907861 is about 9214.5461635395. The cubic root of 84907861 is about 439.5240393888.

The spelling of 84907861 in words is "eighty-four million, nine hundred seven thousand, eight hundred sixty-one".