620825605 has 4 divisors (see below), whose sum is σ = 744990732. Its totient is φ = 496660480.

The previous prime is 620825587. The next prime is 620825651. The reversal of 620825605 is 506528026.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 506528026 = 2 ⋅253264013.

It can be written as a sum of positive squares in 2 ways, for example, as 309161889 + 311663716 = 17583^2 + 17654^2 .

It is not a de Polignac number, because 620825605 - 2¹¹ = 620823557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62082556 + ... + 62082565.

It is an arithmetic number, because the mean of its divisors is an integer number (186247683).

Almost surely, 2^620825605 is an apocalyptic number.

It is an amenable number.

620825605 is a deficient number, since it is larger than the sum of its proper divisors (124165127).

620825605 is a wasteful number, since it uses less digits than its factorization.

620825605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124165126.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 620825605 is about 24916.3722279147. The cubic root of 620825605 is about 853.0802223588.

It can be divided in two parts, 6208 and 25605, that added together give a palindrome (31813).

The spelling of 620825605 in words is "six hundred twenty million, eight hundred twenty-five thousand, six hundred five".