620647 has 2 divisors, whose sum is σ = 620648. Its totient is φ = 620646.

The previous prime is 620639. The next prime is 620657. The reversal of 620647 is 746026.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 620647 - 2³ = 620639 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310323 + 310324.

It is an arithmetic number, because the mean of its divisors is an integer number (310324).

2⁶²⁰⁶⁴⁷ is an apocalyptic number.

620647 is a deficient number, since it is larger than the sum of its proper divisors (1).

620647 is an equidigital number, since it uses as much as digits as its factorization.

620647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 620647 is about 787.8115256836. The cubic root of 620647 is about 85.2998407109.

The spelling of 620647 in words is "six hundred twenty thousand, six hundred forty-seven".