2638567 has 2 divisors, whose sum is σ = 2638568. Its totient is φ = 2638566.

The previous prime is 2638561. The next prime is 2638579. The reversal of 2638567 is 7658362.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2638567 is a prime.

It is a Chen prime.

It is a d-powerful number, because it can be written as 2¹⁹ + 6² + 3⁵ + 8⁷ + 5 + 6² + 7⁵ .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2638561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1319283 + 1319284.

It is an arithmetic number, because the mean of its divisors is an integer number (1319284).

2^2638567 is an apocalyptic number.

2638567 is a deficient number, since it is larger than the sum of its proper divisors (1).

2638567 is an equidigital number, since it uses as much as digits as its factorization.

2638567 is an evil number, because the sum of its binary digits is even.

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

The square root of 2638567 is about 1624.3666458038. The cubic root of 2638567 is about 138.1834534165.

The spelling of 2638567 in words is "two million, six hundred thirty-eight thousand, five hundred sixty-seven".