621343 has 2 divisors, whose sum is σ = 621344. Its totient is φ = 621342.

The previous prime is 621337. The next prime is 621347. The reversal of 621343 is 343126.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 621343 - 2⁹ = 620831 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 621343.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (621347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310671 + 310672.

It is an arithmetic number, because the mean of its divisors is an integer number (310672).

2⁶²¹³⁴³ is an apocalyptic number.

621343 is a deficient number, since it is larger than the sum of its proper divisors (1).

621343 is an equidigital number, since it uses as much as digits as its factorization.

621343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 19.

The square root of 621343 is about 788.2531319316. The cubic root of 621343 is about 85.3317141755.

Adding to 621343 its reverse (343126), we get a palindrome (964469).

The spelling of 621343 in words is "six hundred twenty-one thousand, three hundred forty-three".