84145553 has 4 divisors (see below), whose sum is σ = 84171828. Its totient is φ = 84119280.

The previous prime is 84145543. The next prime is 84145577. The reversal of 84145553 is 35554148.

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 57032704 + 27112849 = 7552^2 + 5207^2 .

It is a cyclic number.

It is not a de Polignac number, because 84145553 - 2²⁴ = 67368337 is a prime.

It is a super-3 number, since 3×84145553³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (84145543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7538 + ... + 15003.

It is an arithmetic number, because the mean of its divisors is an integer number (21042957).

Almost surely, 2^84145553 is an apocalyptic number.

It is an amenable number.

84145553 is a deficient number, since it is larger than the sum of its proper divisors (26275).

84145553 is a wasteful number, since it uses less digits than its factorization.

84145553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26274.

The product of its digits is 48000, while the sum is 35.

The square root of 84145553 is about 9173.0885202313. The cubic root of 84145553 is about 438.2047252255.

The spelling of 84145553 in words is "eighty-four million, one hundred forty-five thousand, five hundred fifty-three".