621133 has 2 divisors, whose sum is σ = 621134. Its totient is φ = 621132.

The previous prime is 621113. The next prime is 621139. The reversal of 621133 is 331126.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 619369 + 1764 = 787^2 + 42^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-621133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (621139) 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, 310566 + 310567.

It is an arithmetic number, because the mean of its divisors is an integer number (310567).

2⁶²¹¹³³ is an apocalyptic number.

It is an amenable number.

621133 is a deficient number, since it is larger than the sum of its proper divisors (1).

621133 is an equidigital number, since it uses as much as digits as its factorization.

621133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108, while the sum is 16.

The square root of 621133 is about 788.1199147338. The cubic root of 621133 is about 85.3220996904.

Adding to 621133 its reverse (331126), we get a palindrome (952259).

The spelling of 621133 in words is "six hundred twenty-one thousand, one hundred thirty-three".