10398123587 has 4 divisors (see below), whose sum is σ = 10398817680. Its totient is φ = 10397429496.

The previous prime is 10398123569. The next prime is 10398123599. The reversal of 10398123587 is 78532189301.

10398123587 is digitally balanced in base 2, 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: 78532189301 = 16103 ⋅4876867.

It is a cyclic number.

It is not a de Polignac number, because 10398123587 - 2¹⁰ = 10398122563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10398123187) 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, 324068 + ... + 354705.

It is an arithmetic number, because the mean of its divisors is an integer number (2599704420).

Almost surely, 2^10398123587 is an apocalyptic number.

10398123587 is a deficient number, since it is larger than the sum of its proper divisors (694093).

10398123587 is an equidigital number, since it uses as much as digits as its factorization.

10398123587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694092.

The product of its (nonzero) digits is 362880, while the sum is 47.

The spelling of 10398123587 in words is "ten billion, three hundred ninety-eight million, one hundred twenty-three thousand, five hundred eighty-seven".