620468517 has 4 divisors (see below), whose sum is σ = 827291360. Its totient is φ = 413645676.

The previous prime is 620468507. The next prime is 620468557. The reversal of 620468517 is 715864026.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 620468517 - 2¹⁹ = 619944229 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 (620468507) 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, 103411417 + ... + 103411422.

It is an arithmetic number, because the mean of its divisors is an integer number (206822840).

Almost surely, 2^620468517 is an apocalyptic number.

It is an amenable number.

620468517 is a deficient number, since it is larger than the sum of its proper divisors (206822843).

620468517 is a wasteful number, since it uses less digits than its factorization.

620468517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206822842.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 620468517 is about 24909.2054670557. The cubic root of 620468517 is about 852.9166320625.

The spelling of 620468517 in words is "six hundred twenty million, four hundred sixty-eight thousand, five hundred seventeen".