620323853 has 4 divisors (see below), whose sum is σ = 620375868. Its totient is φ = 620271840.

The previous prime is 620323849. The next prime is 620323867. The reversal of 620323853 is 358323026.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 618914884 + 1408969 = 24878^2 + 1187^2 .

It is a cyclic number.

It is not a de Polignac number, because 620323853 - 2² = 620323849 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620323843) 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, 1775 + ... + 35267.

It is an arithmetic number, because the mean of its divisors is an integer number (155093967).

Almost surely, 2^620323853 is an apocalyptic number.

It is an amenable number.

620323853 is a deficient number, since it is larger than the sum of its proper divisors (52015).

620323853 is a wasteful number, since it uses less digits than its factorization.

620323853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52014.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 620323853 is about 24906.3014717159. The cubic root of 620323853 is about 852.8503402637.

Adding to 620323853 its reverse (358323026), we get a palindrome (978646879).

The spelling of 620323853 in words is "six hundred twenty million, three hundred twenty-three thousand, eight hundred fifty-three".