620811 has 8 divisors (see below), whose sum is σ = 919760. Its totient is φ = 413856.

The previous prime is 620777. The next prime is 620813. The reversal of 620811 is 118026.

620811 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 620811 - 2¹⁴ = 604427 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11470 + ... + 11523.

It is an arithmetic number, because the mean of its divisors is an integer number (114970).

2⁶²⁰⁸¹¹ is an apocalyptic number.

620811 is a deficient number, since it is larger than the sum of its proper divisors (298949).

620811 is a wasteful number, since it uses less digits than its factorization.

620811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23002 (or 22996 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 620811 is about 787.9156046177. The cubic root of 620811 is about 85.3073532700.

Adding to 620811 its reverse (118026), we get a palindrome (738837).

It can be divided in two parts, 620 and 811, that added together give a triangular number (1431 = T₅₃).

The spelling of 620811 in words is "six hundred twenty thousand, eight hundred eleven".