621473 has 2 divisors, whose sum is σ = 621474. Its totient is φ = 621472.

The previous prime is 621461. The next prime is 621521. The reversal of 621473 is 374126.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 620944 + 529 = 788^2 + 23^2 .

It is a cyclic number.

It is not a de Polignac number, because 621473 - 2⁸ = 621217 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a plaindrome in base 14.

It is not a weakly prime, because it can be changed into another prime (621443) 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, 310736 + 310737.

It is an arithmetic number, because the mean of its divisors is an integer number (310737).

2⁶²¹⁴⁷³ is an apocalyptic number.

It is an amenable number.

621473 is a deficient number, since it is larger than the sum of its proper divisors (1).

621473 is an equidigital number, since it uses as much as digits as its factorization.

621473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 23.

The square root of 621473 is about 788.3355884393. The cubic root of 621473 is about 85.3376649141.

Adding to 621473 its reverse (374126), we get a palindrome (995599).

The spelling of 621473 in words is "six hundred twenty-one thousand, four hundred seventy-three".