620633 has 4 divisors (see below), whose sum is σ = 668388. Its totient is φ = 572880.

The previous prime is 620623. The next prime is 620639. The reversal of 620633 is 336026.

It is a happy number.

620633 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, and also an emirpimes, since its reverse is a distinct semiprime: 336026 = 2 ⋅168013.

It can be written as a sum of positive squares in 2 ways, for example, as 24649 + 595984 = 157^2 + 772^2 .

It is a cyclic number.

It is not a de Polignac number, because 620633 - 2⁶ = 620569 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (620639) 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, 23858 + ... + 23883.

It is an arithmetic number, because the mean of its divisors is an integer number (167097).

2⁶²⁰⁶³³ is an apocalyptic number.

It is an amenable number.

620633 is a deficient number, since it is larger than the sum of its proper divisors (47755).

620633 is a wasteful number, since it uses less digits than its factorization.

620633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47754.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 620633 is about 787.8026402596. The cubic root of 620633 is about 85.2991993335.

Adding to 620633 its reverse (336026), we get a palindrome (956659).

The spelling of 620633 in words is "six hundred twenty thousand, six hundred thirty-three".