100287863 has 4 divisors (see below), whose sum is σ = 108002328. Its totient is φ = 92573400.

The previous prime is 100287853. The next prime is 100287881. The reversal of 100287863 is 368782001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 100287863 - 2¹⁸ = 100025719 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 (100287853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3857213 + ... + 3857238.

It is an arithmetic number, because the mean of its divisors is an integer number (27000582).

Almost surely, 2^100287863 is an apocalyptic number.

100287863 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

100287863 is a deficient number, since it is larger than the sum of its proper divisors (7714465).

100287863 is an equidigital number, since it uses as much as digits as its factorization.

100287863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7714464.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 100287863 is about 10014.3828067435. The cubic root of 100287863 is about 464.6038372436.

The spelling of 100287863 in words is "one hundred million, two hundred eighty-seven thousand, eight hundred sixty-three".