2005638587 has 2 divisors, whose sum is σ = 2005638588. Its totient is φ = 2005638586.

The previous prime is 2005638541. The next prime is 2005638629. The reversal of 2005638587 is 7858365002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2005638587 - 2⁸ = 2005638331 is a prime.

It is a super-2 number, since 2×2005638587² = 8045172283326713138, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2005638517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1002819293 + 1002819294.

It is an arithmetic number, because the mean of its divisors is an integer number (1002819294).

Almost surely, 2^2005638587 is an apocalyptic number.

2005638587 is a deficient number, since it is larger than the sum of its proper divisors (1).

2005638587 is an equidigital number, since it uses as much as digits as its factorization.

2005638587 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 403200, while the sum is 44.

The square root of 2005638587 is about 44784.3564986704. The cubic root of 2005638587 is about 1261.1039680014.

The spelling of 2005638587 in words is "two billion, five million, six hundred thirty-eight thousand, five hundred eighty-seven".