84044641 has 4 divisors (see below), whose sum is σ = 85422484. Its totient is φ = 82666800.

The previous prime is 84044633. The next prime is 84044647. The reversal of 84044641 is 14644048.

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 39955041 + 44089600 = 6321^2 + 6640^2 .

It is a cyclic number.

It is not a de Polignac number, because 84044641 - 2³ = 84044633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84044647) 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, 688830 + ... + 688951.

It is an arithmetic number, because the mean of its divisors is an integer number (21355621).

Almost surely, 2^84044641 is an apocalyptic number.

It is an amenable number.

84044641 is a deficient number, since it is larger than the sum of its proper divisors (1377843).

84044641 is a wasteful number, since it uses less digits than its factorization.

84044641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1377842.

The product of its (nonzero) digits is 12288, while the sum is 31.

The square root of 84044641 is about 9167.5864326441. The cubic root of 84044641 is about 438.0294820407.

Adding to 84044641 its reverse (14644048), we get a palindrome (98688689).

The spelling of 84044641 in words is "eighty-four million, forty-four thousand, six hundred forty-one".