83444861 has 12 divisors (see below), whose sum is σ = 86971092. Its totient is φ = 80056704.

The previous prime is 83444849. The next prime is 83444869. The reversal of 83444861 is 16844438.

It can be written as a sum of positive squares in 6 ways, for example, as 26728900 + 56715961 = 5170^2 + 7531^2 .

It is a de Polignac number, because none of the positive numbers 2^k-83444861 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 (83444869) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 263075 + ... + 263391.

It is an arithmetic number, because the mean of its divisors is an integer number (7247591).

Almost surely, 2^83444861 is an apocalyptic number.

It is an amenable number.

83444861 is a deficient number, since it is larger than the sum of its proper divisors (3526231).

83444861 is a wasteful number, since it uses less digits than its factorization.

83444861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688 (or 659 counting only the distinct ones).

The product of its digits is 73728, while the sum is 38.

The square root of 83444861 is about 9134.8158711602. The cubic root of 83444861 is about 436.9850022868.

The spelling of 83444861 in words is "eighty-three million, four hundred forty-four thousand, eight hundred sixty-one".