621703 has 2 divisors, whose sum is σ = 621704. Its totient is φ = 621702.

The previous prime is 621701. The next prime is 621721. The reversal of 621703 is 307126.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 621703 - 2¹ = 621701 is a prime.

Together with 621701, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (621701) 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, 310851 + 310852.

It is an arithmetic number, because the mean of its divisors is an integer number (310852).

2⁶²¹⁷⁰³ is an apocalyptic number.

621703 is a deficient number, since it is larger than the sum of its proper divisors (1).

621703 is an equidigital number, since it uses as much as digits as its factorization.

621703 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 621703 is about 788.4814519061. The cubic root of 621703 is about 85.3481911114.

Adding to 621703 its reverse (307126), we get a palindrome (928829).

The spelling of 621703 in words is "six hundred twenty-one thousand, seven hundred three".