620553443 has 4 divisors (see below), whose sum is σ = 640571328. Its totient is φ = 600535560.

The previous prime is 620553421. The next prime is 620553457. The reversal of 620553443 is 344355026.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 620553443 - 2⁸ = 620553187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620553343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10008896 + ... + 10008957.

It is an arithmetic number, because the mean of its divisors is an integer number (160142832).

Almost surely, 2^620553443 is an apocalyptic number.

620553443 is a deficient number, since it is larger than the sum of its proper divisors (20017885).

620553443 is a wasteful number, since it uses less digits than its factorization.

620553443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20017884.

The product of its (nonzero) digits is 43200, while the sum is 32.

The square root of 620553443 is about 24910.9101198652. The cubic root of 620553443 is about 852.9555443206.

The spelling of 620553443 in words is "six hundred twenty million, five hundred fifty-three thousand, four hundred forty-three".