620441933 has 2 divisors, whose sum is σ = 620441934. Its totient is φ = 620441932.

The previous prime is 620441891. The next prime is 620441959. The reversal of 620441933 is 339144026.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 413024329 + 207417604 = 20323^2 + 14402^2 .

It is a cyclic number.

It is not a de Polignac number, because 620441933 - 2⁶ = 620441869 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 620441933.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620441963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310220966 + 310220967.

It is an arithmetic number, because the mean of its divisors is an integer number (310220967).

Almost surely, 2^620441933 is an apocalyptic number.

It is an amenable number.

620441933 is a deficient number, since it is larger than the sum of its proper divisors (1).

620441933 is an equidigital number, since it uses as much as digits as its factorization.

620441933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 620441933 is about 24908.6718433561. The cubic root of 620441933 is about 852.9044508054.

Adding to 620441933 its reverse (339144026), we get a palindrome (959585959).

The spelling of 620441933 in words is "six hundred twenty million, four hundred forty-one thousand, nine hundred thirty-three".