616438447 has 4 divisors (see below), whose sum is σ = 621144216. Its totient is φ = 611732680.

The previous prime is 616438429. The next prime is 616438457. The reversal of 616438447 is 744834616.

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 616438447 - 2¹⁵ = 616405679 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 (616438457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2352688 + ... + 2352949.

It is an arithmetic number, because the mean of its divisors is an integer number (155286054).

Almost surely, 2^616438447 is an apocalyptic number.

616438447 is a deficient number, since it is larger than the sum of its proper divisors (4705769).

616438447 is a wasteful number, since it uses less digits than its factorization.

616438447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4705768.

The product of its digits is 387072, while the sum is 43.

The square root of 616438447 is about 24828.1784873559. The cubic root of 616438447 is about 851.0659968158.

The spelling of 616438447 in words is "six hundred sixteen million, four hundred thirty-eight thousand, four hundred forty-seven".