620643 has 8 divisors (see below), whose sum is σ = 831168. Its totient is φ = 411944.

The previous prime is 620639. The next prime is 620647. The reversal of 620643 is 346026.

620643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (620639) and next prime (620647).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 620643 - 2² = 620639 is a prime.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (620647) 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, 1096 + ... + 1562.

It is an arithmetic number, because the mean of its divisors is an integer number (103896).

2⁶²⁰⁶⁴³ is an apocalyptic number.

620643 is a deficient number, since it is larger than the sum of its proper divisors (210525).

620643 is a wasteful number, since it uses less digits than its factorization.

620643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 620643 is about 787.8089870013. The cubic root of 620643 is about 85.2996574612.

Adding to 620643 its reverse (346026), we get a palindrome (966669).

The spelling of 620643 in words is "six hundred twenty thousand, six hundred forty-three".