621810941 has 2 divisors, whose sum is σ = 621810942. Its totient is φ = 621810940.

The previous prime is 621810901. The next prime is 621810983. The reversal of 621810941 is 149018126.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 615288025 + 6522916 = 24805^2 + 2554^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-621810941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 621810898 and 621810907.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (621810901) 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, 310905470 + 310905471.

It is an arithmetic number, because the mean of its divisors is an integer number (310905471).

Almost surely, 2^621810941 is an apocalyptic number.

It is an amenable number.

621810941 is a deficient number, since it is larger than the sum of its proper divisors (1).

621810941 is an equidigital number, since it uses as much as digits as its factorization.

621810941 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 621810941 is about 24936.1372509858. The cubic root of 621810941 is about 853.5313025217.

The spelling of 621810941 in words is "six hundred twenty-one million, eight hundred ten thousand, nine hundred forty-one".