620868085 has 4 divisors (see below), whose sum is σ = 745041708. Its totient is φ = 496694464.

The previous prime is 620868071. The next prime is 620868089. The reversal of 620868085 is 580868026.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 359140401 + 261727684 = 18951^2 + 16178^2 .

It is a cyclic number.

It is not a de Polignac number, because 620868085 - 2⁹ = 620867573 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 (620868089) 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, 62086804 + ... + 62086813.

It is an arithmetic number, because the mean of its divisors is an integer number (186260427).

Almost surely, 2^620868085 is an apocalyptic number.

It is an amenable number.

620868085 is a deficient number, since it is larger than the sum of its proper divisors (124173623).

620868085 is a wasteful number, since it uses less digits than its factorization.

620868085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124173622.

The product of its (nonzero) digits is 184320, while the sum is 43.

The square root of 620868085 is about 24917.2246648779. The cubic root of 620868085 is about 853.0996792567.

The spelling of 620868085 in words is "six hundred twenty million, eight hundred sixty-eight thousand, eighty-five".