1604263 has 2 divisors, whose sum is σ = 1604264. Its totient is φ = 1604262.

The previous prime is 1604243. The next prime is 1604279. The reversal of 1604263 is 3624061.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1604263 - 2⁵ = 1604231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1604243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802131 + 802132.

It is an arithmetic number, because the mean of its divisors is an integer number (802132).

2^1604263 is an apocalyptic number.

1604263 is a deficient number, since it is larger than the sum of its proper divisors (1).

1604263 is an equidigital number, since it uses as much as digits as its factorization.

1604263 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 1604263 is about 1266.5950418346. The cubic root of 1604263 is about 117.0644931403.

The spelling of 1604263 in words is "one million, six hundred four thousand, two hundred sixty-three".