390647 has 2 divisors, whose sum is σ = 390648. Its totient is φ = 390646.

The previous prime is 390581. The next prime is 390653. The reversal of 390647 is 746093.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 390647 - 2⁸ = 390391 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 390647.

It is not a weakly prime, because it can be changed into another prime (390347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195323 + 195324.

It is an arithmetic number, because the mean of its divisors is an integer number (195324).

2³⁹⁰⁶⁴⁷ is an apocalyptic number.

390647 is a deficient number, since it is larger than the sum of its proper divisors (1).

390647 is an equidigital number, since it uses as much as digits as its factorization.

390647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 390647 is about 625.0175997522. The cubic root of 390647 is about 73.1018157686.

The spelling of 390647 in words is "three hundred ninety thousand, six hundred forty-seven".