616328389 has 2 divisors, whose sum is σ = 616328390. Its totient is φ = 616328388.

The previous prime is 616328347. The next prime is 616328393. The reversal of 616328389 is 983823616.

616328389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 613404289 + 2924100 = 24767^2 + 1710^2 .

It is a cyclic number.

It is not a de Polignac number, because 616328389 - 2⁷ = 616328261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616328399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308164194 + 308164195.

It is an arithmetic number, because the mean of its divisors is an integer number (308164195).

Almost surely, 2^616328389 is an apocalyptic number.

It is an amenable number.

616328389 is a deficient number, since it is larger than the sum of its proper divisors (1).

616328389 is an equidigital number, since it uses as much as digits as its factorization.

616328389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 46.

The square root of 616328389 is about 24825.9619954595. The cubic root of 616328389 is about 851.0153444504.

The spelling of 616328389 in words is "six hundred sixteen million, three hundred twenty-eight thousand, three hundred eighty-nine".