620566171 has 4 divisors (see below), whose sum is σ = 620645344. Its totient is φ = 620487000.

The previous prime is 620566169. The next prime is 620566213. The reversal of 620566171 is 171665026.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 620566171 - 2¹ = 620566169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620576171) 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 in 3 ways as a sum of consecutive naturals, for example, 26355 + ... + 43996.

It is an arithmetic number, because the mean of its divisors is an integer number (155161336).

Almost surely, 2^620566171 is an apocalyptic number.

620566171 is a deficient number, since it is larger than the sum of its proper divisors (79173).

620566171 is an equidigital number, since it uses as much as digits as its factorization.

620566171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79172.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 620566171 is about 24911.1655889483. The cubic root of 620566171 is about 852.9613758591.

The spelling of 620566171 in words is "six hundred twenty million, five hundred sixty-six thousand, one hundred seventy-one".