390604243 has 2 divisors, whose sum is σ = 390604244. Its totient is φ = 390604242.

The previous prime is 390604211. The next prime is 390604259. The reversal of 390604243 is 342406093.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 390604243 - 2⁵ = 390604211 is a prime.

It is not a weakly prime, because it can be changed into another prime (390604273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195302121 + 195302122.

It is an arithmetic number, because the mean of its divisors is an integer number (195302122).

Almost surely, 2^390604243 is an apocalyptic number.

390604243 is a deficient number, since it is larger than the sum of its proper divisors (1).

390604243 is an equidigital number, since it uses as much as digits as its factorization.

390604243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 390604243 is about 19763.7102538972. The cubic root of 390604243 is about 730.9914863055.

The spelling of 390604243 in words is "three hundred ninety million, six hundred four thousand, two hundred forty-three".