399038617 has 2 divisors, whose sum is σ = 399038618. Its totient is φ = 399038616.

The previous prime is 399038597. The next prime is 399038641. The reversal of 399038617 is 716830993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 391287961 + 7750656 = 19781^2 + 2784^2 .

It is a cyclic number.

It is not a de Polignac number, because 399038617 - 2¹⁹ = 398514329 is a prime.

It is a super-3 number, since 3×399038617³ (a number of 27 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (399038657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199519308 + 199519309.

It is an arithmetic number, because the mean of its divisors is an integer number (199519309).

Almost surely, 2^399038617 is an apocalyptic number.

It is an amenable number.

399038617 is a deficient number, since it is larger than the sum of its proper divisors (1).

399038617 is an equidigital number, since it uses as much as digits as its factorization.

399038617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 399038617 is about 19975.9509660992. The cubic root of 399038617 is about 736.2155319709.

The spelling of 399038617 in words is "three hundred ninety-nine million, thirty-eight thousand, six hundred seventeen".