620305471 has 4 divisors (see below), whose sum is σ = 621308200. Its totient is φ = 619302744.

The previous prime is 620305459. The next prime is 620305489. The reversal of 620305471 is 174503026.

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 620305471 - 2¹⁵ = 620272703 is a prime.

It is a super-3 number, since 3×620305471³ (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 (620305451) 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, 500436 + ... + 501673.

It is an arithmetic number, because the mean of its divisors is an integer number (155327050).

Almost surely, 2^620305471 is an apocalyptic number.

620305471 is a deficient number, since it is larger than the sum of its proper divisors (1002729).

620305471 is a wasteful number, since it uses less digits than its factorization.

620305471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002728.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 620305471 is about 24905.9324459053. The cubic root of 620305471 is about 852.8419160351.

Adding to 620305471 its reverse (174503026), we get a palindrome (794808497).

The spelling of 620305471 in words is "six hundred twenty million, three hundred five thousand, four hundred seventy-one".