620500591 has 2 divisors, whose sum is σ = 620500592. Its totient is φ = 620500590.

The previous prime is 620500589. The next prime is 620500603. The reversal of 620500591 is 195005026.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 620500591 - 2¹ = 620500589 is a prime.

Together with 620500589, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620500091) 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, 310250295 + 310250296.

It is an arithmetic number, because the mean of its divisors is an integer number (310250296).

Almost surely, 2^620500591 is an apocalyptic number.

620500591 is a deficient number, since it is larger than the sum of its proper divisors (1).

620500591 is an equidigital number, since it uses as much as digits as its factorization.

620500591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 620500591 is about 24909.8492769426. The cubic root of 620500591 is about 852.9313284711.

The spelling of 620500591 in words is "six hundred twenty million, five hundred thousand, five hundred ninety-one".