616398173 has 2 divisors, whose sum is σ = 616398174. Its totient is φ = 616398172.

The previous prime is 616398151. The next prime is 616398227. The reversal of 616398173 is 371893616.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 566582809 + 49815364 = 23803^2 + 7058^2 .

It is a cyclic number.

It is not a de Polignac number, because 616398173 - 2¹⁴ = 616381789 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616398773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308199086 + 308199087.

It is an arithmetic number, because the mean of its divisors is an integer number (308199087).

Almost surely, 2^616398173 is an apocalyptic number.

It is an amenable number.

616398173 is a deficient number, since it is larger than the sum of its proper divisors (1).

616398173 is an equidigital number, since it uses as much as digits as its factorization.

616398173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 44.

The square root of 616398173 is about 24827.3674198454. The cubic root of 616398173 is about 851.0474620761.

The spelling of 616398173 in words is "six hundred sixteen million, three hundred ninety-eight thousand, one hundred seventy-three".