620531471 has 4 divisors (see below), whose sum is σ = 709178832. Its totient is φ = 531884112.

The previous prime is 620531449. The next prime is 620531503. The reversal of 620531471 is 174135026.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620531471 is a prime.

It is a super-3 number, since 3×620531471³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620531771) 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, 44323670 + ... + 44323683.

It is an arithmetic number, because the mean of its divisors is an integer number (177294708).

Almost surely, 2^620531471 is an apocalyptic number.

620531471 is a deficient number, since it is larger than the sum of its proper divisors (88647361).

620531471 is an equidigital number, since it uses as much as digits as its factorization.

620531471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88647360.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 620531471 is about 24910.4691043746. The cubic root of 620531471 is about 852.9454773067.

Adding to 620531471 its reverse (174135026), we get a palindrome (794666497).

The spelling of 620531471 in words is "six hundred twenty million, five hundred thirty-one thousand, four hundred seventy-one".