620509247 has 8 divisors (see below), whose sum is σ = 625302720. Its totient is φ = 615734560.

The previous prime is 620509243. The next prime is 620509261. The reversal of 620509247 is 742905026.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 620509247 - 2² = 620509243 is a prime.

It is a super-2 number, since 2×620509247² = 770063451225014018, which contains 22 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 (620509243) 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 7 ways as a sum of consecutive naturals, for example, 65597 + ... + 74457.

It is an arithmetic number, because the mean of its divisors is an integer number (78162840).

Almost surely, 2^620509247 is an apocalyptic number.

620509247 is a deficient number, since it is larger than the sum of its proper divisors (4793473).

620509247 is a wasteful number, since it uses less digits than its factorization.

620509247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9393.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 620509247 is about 24910.0230228717. The cubic root of 620509247 is about 852.9352945910.

The spelling of 620509247 in words is "six hundred twenty million, five hundred nine thousand, two hundred forty-seven".