13898123287 has 4 divisors (see below), whose sum is σ = 14629603480. Its totient is φ = 13166643096.

The previous prime is 13898123279. The next prime is 13898123311. The reversal of 13898123287 is 78232189831.

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 13898123287 - 2³ = 13898123279 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 (13898123387) 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, 365740068 + ... + 365740105.

It is an arithmetic number, because the mean of its divisors is an integer number (3657400870).

Almost surely, 2^13898123287 is an apocalyptic number.

13898123287 is a deficient number, since it is larger than the sum of its proper divisors (731480193).

13898123287 is an equidigital number, since it uses as much as digits as its factorization.

13898123287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731480192.

The product of its digits is 1161216, while the sum is 52.

The spelling of 13898123287 in words is "thirteen billion, eight hundred ninety-eight million, one hundred twenty-three thousand, two hundred eighty-seven".