620520447 has 4 divisors (see below), whose sum is σ = 827360600. Its totient is φ = 413680296.

The previous prime is 620520437. The next prime is 620520491. The reversal of 620520447 is 744025026.

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

It is not a de Polignac number, because 620520447 - 2¹⁶ = 620454911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620520437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103420072 + ... + 103420077.

It is an arithmetic number, because the mean of its divisors is an integer number (206840150).

Almost surely, 2^620520447 is an apocalyptic number.

620520447 is a deficient number, since it is larger than the sum of its proper divisors (206840153).

620520447 is a wasteful number, since it uses less digits than its factorization.

620520447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206840152.

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 620520447 is about 24910.2478309631. The cubic root of 620520447 is about 852.9404262996.

The spelling of 620520447 in words is "six hundred twenty million, five hundred twenty thousand, four hundred forty-seven".