985553 has 4 divisors (see below), whose sum is σ = 988980. Its totient is φ = 982128.

The previous prime is 985547. The next prime is 985571. The reversal of 985553 is 355589.

985553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 107584 + 877969 = 328^2 + 937^2 .

It is a cyclic number.

It is not a de Polignac number, because 985553 - 2¹⁸ = 723409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (985253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1238 + ... + 1871.

It is an arithmetic number, because the mean of its divisors is an integer number (247245).

2⁹⁸⁵⁵⁵³ is an apocalyptic number.

It is an amenable number.

985553 is a deficient number, since it is larger than the sum of its proper divisors (3427).

985553 is a wasteful number, since it uses less digits than its factorization.

985553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3426.

The product of its digits is 27000, while the sum is 35.

The square root of 985553 is about 992.7502203475. The cubic root of 985553 is about 99.5160954745.

The spelling of 985553 in words is "nine hundred eighty-five thousand, five hundred fifty-three".