553385993 has 4 divisors (see below), whose sum is σ = 555443460. Its totient is φ = 551328528.

The previous prime is 553385981. The next prime is 553386011. The reversal of 553385993 is 399583355.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 399583355 = 5 ⋅79916671.

It can be written as a sum of positive squares in 2 ways, for example, as 336795904 + 216590089 = 18352^2 + 14717^2 .

It is a cyclic number.

It is not a de Polignac number, because 553385993 - 2⁴ = 553385977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (553385923) 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, 1028330 + ... + 1028867.

It is an arithmetic number, because the mean of its divisors is an integer number (138860865).

Almost surely, 2^553385993 is an apocalyptic number.

It is an amenable number.

553385993 is a deficient number, since it is larger than the sum of its proper divisors (2057467).

553385993 is a wasteful number, since it uses less digits than its factorization.

553385993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2057466.

The product of its digits is 2187000, while the sum is 50.

The square root of 553385993 is about 23524.1576469807. The cubic root of 553385993 is about 820.9991751235. Note that the first 3 decimals are identical.

The spelling of 553385993 in words is "five hundred fifty-three million, three hundred eighty-five thousand, nine hundred ninety-three".