616674389 has 2 divisors, whose sum is σ = 616674390. Its totient is φ = 616674388.

The previous prime is 616674379. The next prime is 616674403. The reversal of 616674389 is 983476616.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 360354289 + 256320100 = 18983^2 + 16010^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-616674389 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616674319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308337194 + 308337195.

It is an arithmetic number, because the mean of its divisors is an integer number (308337195).

Almost surely, 2^616674389 is an apocalyptic number.

It is an amenable number.

616674389 is a deficient number, since it is larger than the sum of its proper divisors (1).

616674389 is an equidigital number, since it uses as much as digits as its factorization.

616674389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 50.

The square root of 616674389 is about 24832.9295291554. The cubic root of 616674389 is about 851.1745648871.

The spelling of 616674389 in words is "six hundred sixteen million, six hundred seventy-four thousand, three hundred eighty-nine".