84520889 has 8 divisors (see below), whose sum is σ = 90315720. Its totient is φ = 78817536.

The previous prime is 84520867. The next prime is 84520901. The reversal of 84520889 is 98802548.

It can be written as a sum of positive squares in 4 ways, for example, as 8970025 + 75550864 = 2995^2 + 8692^2 .

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 84520889 - 2⁸ = 84520633 is a prime.

It is a super-4 number, since 4×84520889⁴ (a number of 33 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84520829) 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, 20954 + ... + 24659.

It is an arithmetic number, because the mean of its divisors is an integer number (11289465).

Almost surely, 2^84520889 is an apocalyptic number.

It is an amenable number.

84520889 is a deficient number, since it is larger than the sum of its proper divisors (5794831).

84520889 is a wasteful number, since it uses less digits than its factorization.

84520889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45739.

The product of its (nonzero) digits is 184320, while the sum is 44.

The square root of 84520889 is about 9193.5242970256. The cubic root of 84520889 is about 438.8553045236.

The spelling of 84520889 in words is "eighty-four million, five hundred twenty thousand, eight hundred eighty-nine".