2540663 has 2 divisors, whose sum is σ = 2540664. Its totient is φ = 2540662.

The previous prime is 2540641. The next prime is 2540677. The reversal of 2540663 is 3660452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2540663 - 2⁸ = 2540407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2540693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1270331 + 1270332.

It is an arithmetic number, because the mean of its divisors is an integer number (1270332).

2^2540663 is an apocalyptic number.

2540663 is a deficient number, since it is larger than the sum of its proper divisors (1).

2540663 is an equidigital number, since it uses as much as digits as its factorization.

2540663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 2540663 is about 1593.9457330788. The cubic root of 2540663 is about 136.4527693760.

The spelling of 2540663 in words is "two million, five hundred forty thousand, six hundred sixty-three".