5220639 has 8 divisors (see below), whose sum is σ = 7734320. Its totient is φ = 3480408.

The previous prime is 5220613. The next prime is 5220641. The reversal of 5220639 is 9360225.

5220639 is a `hidden beast` number, since 5 + 2 + 20 + 639 = 666.

It is not a de Polignac number, because 5220639 - 2⁷ = 5220511 is a prime.

It is a super-3 number, since 3×5220639³ (a number of 21 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 193357 = 5220639 / (5 + 2 + 2 + 0 + 6 + 3 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5220689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96652 + ... + 96705.

It is an arithmetic number, because the mean of its divisors is an integer number (966790).

Almost surely, 2^5220639 is an apocalyptic number.

5220639 is a deficient number, since it is larger than the sum of its proper divisors (2513681).

5220639 is a wasteful number, since it uses less digits than its factorization.

5220639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193366 (or 193360 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 5220639 is about 2284.8717688308. The cubic root of 5220639 is about 173.4767275769.

The spelling of 5220639 in words is "five million, two hundred twenty thousand, six hundred thirty-nine".