2563867 has 2 divisors, whose sum is σ = 2563868. Its totient is φ = 2563866.

The previous prime is 2563859. The next prime is 2563877. The reversal of 2563867 is 7683652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2563867 - 2³ = 2563859 is a prime.

It is not a weakly prime, because it can be changed into another prime (2563837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1281933 + 1281934.

It is an arithmetic number, because the mean of its divisors is an integer number (1281934).

2^2563867 is an apocalyptic number.

2563867 is a deficient number, since it is larger than the sum of its proper divisors (1).

2563867 is an equidigital number, since it uses as much as digits as its factorization.

2563867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 37.

The square root of 2563867 is about 1601.2079814940. The cubic root of 2563867 is about 136.8669210497.

The spelling of 2563867 in words is "two million, five hundred sixty-three thousand, eight hundred sixty-seven".