620406443 has 2 divisors, whose sum is σ = 620406444. Its totient is φ = 620406442.

The previous prime is 620406431. The next prime is 620406461. The reversal of 620406443 is 344604026.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 620406443 - 2⁴ = 620406427 is a prime.

It is not a weakly prime, because it can be changed into another prime (620406403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310203221 + 310203222.

It is an arithmetic number, because the mean of its divisors is an integer number (310203222).

Almost surely, 2^620406443 is an apocalyptic number.

620406443 is a deficient number, since it is larger than the sum of its proper divisors (1).

620406443 is an equidigital number, since it uses as much as digits as its factorization.

620406443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 29.

The square root of 620406443 is about 24907.9594306720. The cubic root of 620406443 is about 852.8881881198. Note that the first 3 decimals are identical.

The spelling of 620406443 in words is "six hundred twenty million, four hundred six thousand, four hundred forty-three".