620449 has 4 divisors (see below), whose sum is σ = 656964. Its totient is φ = 583936.

The previous prime is 620441. The next prime is 620461. The reversal of 620449 is 944026.

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 577600 + 42849 = 760^2 + 207^2 .

It is a cyclic number.

It is not a de Polignac number, because 620449 - 2³ = 620441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18232 + ... + 18265.

It is an arithmetic number, because the mean of its divisors is an integer number (164241).

2⁶²⁰⁴⁴⁹ is an apocalyptic number.

It is an amenable number.

620449 is a deficient number, since it is larger than the sum of its proper divisors (36515).

620449 is a wasteful number, since it uses less digits than its factorization.

620449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36514.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 620449 is about 787.6858510853. The cubic root of 620449 is about 85.2907689063.

The spelling of 620449 in words is "six hundred twenty thousand, four hundred forty-nine".