399601 has 2 divisors, whose sum is σ = 399602. Its totient is φ = 399600.

The previous prime is 399587. The next prime is 399613. The reversal of 399601 is 106993.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 360000 + 39601 = 600^2 + 199^2 .

It is an emirp because it is prime and its reverse (106993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 399601 - 2⁷ = 399473 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 399601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199800 + 199801.

It is an arithmetic number, because the mean of its divisors is an integer number (199801).

2³⁹⁹⁶⁰¹ is an apocalyptic number.

It is an amenable number.

399601 is a deficient number, since it is larger than the sum of its proper divisors (1).

399601 is an equidigital number, since it uses as much as digits as its factorization.

399601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 399601 is about 632.1400161357. The cubic root of 399601 is about 73.6561230130.

It can be divided in two parts, 399 and 601, that added together give a cube (1000 = 10³).

The spelling of 399601 in words is "three hundred ninety-nine thousand, six hundred one".