616447 has 4 divisors (see below), whose sum is σ = 663880. Its totient is φ = 569016.

The previous prime is 616439. The next prime is 616459. The reversal of 616447 is 744616.

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

It is a cyclic number.

It is not a de Polignac number, because 616447 - 2³ = 616439 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 (616547) 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, 23697 + ... + 23722.

It is an arithmetic number, because the mean of its divisors is an integer number (165970).

2⁶¹⁶⁴⁴⁷ is an apocalyptic number.

616447 is a deficient number, since it is larger than the sum of its proper divisors (47433).

616447 is a wasteful number, since it uses less digits than its factorization.

616447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47432.

The product of its digits is 4032, while the sum is 28.

The square root of 616447 is about 785.1413885409. The cubic root of 616447 is about 85.1069932939.

The spelling of 616447 in words is "six hundred sixteen thousand, four hundred forty-seven".