2563387 has 2 divisors, whose sum is σ = 2563388. Its totient is φ = 2563386.

The previous prime is 2563381. The next prime is 2563409. The reversal of 2563387 is 7833652.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2563387 is a prime.

It is not a weakly prime, because it can be changed into another prime (2563381) 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, 1281693 + 1281694.

It is an arithmetic number, because the mean of its divisors is an integer number (1281694).

2^2563387 is an apocalyptic number.

2563387 is a deficient number, since it is larger than the sum of its proper divisors (1).

2563387 is an equidigital number, since it uses as much as digits as its factorization.

2563387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 34.

The square root of 2563387 is about 1601.0580876408. The cubic root of 2563387 is about 136.8583792360.

The spelling of 2563387 in words is "two million, five hundred sixty-three thousand, three hundred eighty-seven".