620456563 has 4 divisors (see below), whose sum is σ = 620631720. Its totient is φ = 620281408.

The previous prime is 620456539. The next prime is 620456581. The reversal of 620456563 is 365654026.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620456563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620451563) 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, 82153 + ... + 89386.

It is an arithmetic number, because the mean of its divisors is an integer number (155157930).

Almost surely, 2^620456563 is an apocalyptic number.

620456563 is a deficient number, since it is larger than the sum of its proper divisors (175157).

620456563 is a wasteful number, since it uses less digits than its factorization.

620456563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175156.

The product of its (nonzero) digits is 129600, while the sum is 37.

The square root of 620456563 is about 24908.9655144488. The cubic root of 620456563 is about 852.9111545721.

The spelling of 620456563 in words is "six hundred twenty million, four hundred fifty-six thousand, five hundred sixty-three".