620622439 has 2 divisors, whose sum is σ = 620622440. Its totient is φ = 620622438.

The previous prime is 620622437. The next prime is 620622461. The reversal of 620622439 is 934226026.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 620622439 - 2¹ = 620622437 is a prime.

Together with 620622437, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620622437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310311219 + 310311220.

It is an arithmetic number, because the mean of its divisors is an integer number (310311220).

Almost surely, 2^620622439 is an apocalyptic number.

620622439 is a deficient number, since it is larger than the sum of its proper divisors (1).

620622439 is an equidigital number, since it uses as much as digits as its factorization.

620622439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 620622439 is about 24912.2949364365. The cubic root of 620622439 is about 852.9871549957.

The spelling of 620622439 in words is "six hundred twenty million, six hundred twenty-two thousand, four hundred thirty-nine".