390289 has 2 divisors, whose sum is σ = 390290. Its totient is φ = 390288.

The previous prime is 390281. The next prime is 390307. The reversal of 390289 is 982093.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 242064 + 148225 = 492^2 + 385^2 .

It is a cyclic number.

It is not a de Polignac number, because 390289 - 2³ = 390281 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 390289.

It is not a weakly prime, because it can be changed into another prime (390281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195144 + 195145.

It is an arithmetic number, because the mean of its divisors is an integer number (195145).

2³⁹⁰²⁸⁹ is an apocalyptic number.

It is an amenable number.

390289 is a deficient number, since it is larger than the sum of its proper divisors (1).

390289 is an equidigital number, since it uses as much as digits as its factorization.

390289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 390289 is about 624.7311421724. The cubic root of 390289 is about 73.0794780838.

The spelling of 390289 in words is "three hundred ninety thousand, two hundred eighty-nine".