84805389 has 6 divisors (see below), whose sum is σ = 122496686. Its totient is φ = 56536920.

The previous prime is 84805387. The next prime is 84805411. The reversal of 84805389 is 98350848.

It can be written as a sum of positive squares in only one way, i.e., 74132100 + 10673289 = 8610^2 + 3267^2 .

It is not a de Polignac number, because 84805389 - 2¹ = 84805387 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 (84805381) 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 5 ways as a sum of consecutive naturals, for example, 4711402 + ... + 4711419.

Almost surely, 2^84805389 is an apocalyptic number.

It is an amenable number.

84805389 is a deficient number, since it is larger than the sum of its proper divisors (37691297).

84805389 is a wasteful number, since it uses less digits than its factorization.

84805389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9422827 (or 9422824 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 84805389 is about 9208.9841459305. The cubic root of 84805389 is about 439.3471533794.

The spelling of 84805389 in words is "eighty-four million, eight hundred five thousand, three hundred eighty-nine".