620486809 has 16 divisors (see below), whose sum is σ = 642297600. Its totient is φ = 599104000.

The previous prime is 620486803. The next prime is 620486827. The reversal of 620486809 is 908684026.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 620486809 - 2⁷ = 620486681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620486803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1757577 + ... + 1757929.

It is an arithmetic number, because the mean of its divisors is an integer number (40143600).

Almost surely, 2^620486809 is an apocalyptic number.

It is an amenable number.

620486809 is a deficient number, since it is larger than the sum of its proper divisors (21810791).

620486809 is a wasteful number, since it uses less digits than its factorization.

620486809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800.

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 620486809 is about 24909.5726378435. The cubic root of 620486809 is about 852.9250135770.

The spelling of 620486809 in words is "six hundred twenty million, four hundred eighty-six thousand, eight hundred nine".