616563943 has 2 divisors, whose sum is σ = 616563944. Its totient is φ = 616563942.

The previous prime is 616563931. The next prime is 616563977. The reversal of 616563943 is 349365616.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 616563943 - 2⁵ = 616563911 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 616563943.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616564943) 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 as a sum of consecutive naturals, namely, 308281971 + 308281972.

It is an arithmetic number, because the mean of its divisors is an integer number (308281972).

Almost surely, 2^616563943 is an apocalyptic number.

616563943 is a deficient number, since it is larger than the sum of its proper divisors (1).

616563943 is an equidigital number, since it uses as much as digits as its factorization.

616563943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 349920, while the sum is 43.

The square root of 616563943 is about 24830.7056484507. The cubic root of 616563943 is about 851.1237469079.

The spelling of 616563943 in words is "six hundred sixteen million, five hundred sixty-three thousand, nine hundred forty-three".