1005825863 has 4 divisors (see below), whose sum is σ = 1149515280. Its totient is φ = 862136448.

The previous prime is 1005825839. The next prime is 1005825911. The reversal of 1005825863 is 3685285001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3685285001 = 311 ⋅11849791.

It is a cyclic number.

It is not a de Polignac number, because 1005825863 - 2¹² = 1005821767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005825833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71844698 + ... + 71844711.

It is an arithmetic number, because the mean of its divisors is an integer number (287378820).

Almost surely, 2^1005825863 is an apocalyptic number.

1005825863 is a deficient number, since it is larger than the sum of its proper divisors (143689417).

1005825863 is an equidigital number, since it uses as much as digits as its factorization.

1005825863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143689416.

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 1005825863 is about 31714.7578108363. The cubic root of 1005825863 is about 1001.9381953053.

The spelling of 1005825863 in words is "one billion, five million, eight hundred twenty-five thousand, eight hundred sixty-three".