10243987 has 4 divisors (see below), whose sum is σ = 11032000. Its totient is φ = 9455976.

The previous prime is 10243969. The next prime is 10244011. The reversal of 10243987 is 78934201.

10243987 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78934201 = 29 ⋅2721869.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10243987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10243927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 393987 + ... + 394012.

It is an arithmetic number, because the mean of its divisors is an integer number (2758000).

Almost surely, 2^10243987 is an apocalyptic number.

10243987 is a deficient number, since it is larger than the sum of its proper divisors (788013).

10243987 is an equidigital number, since it uses as much as digits as its factorization.

10243987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788012.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 10243987 is about 3200.6229081227. The cubic root of 10243987 is about 217.1815889598.

The spelling of 10243987 in words is "ten million, two hundred forty-three thousand, nine hundred eighty-seven".