13998617 has 8 divisors (see below), whose sum is σ = 14428296. Its totient is φ = 13571712.

The previous prime is 13998613. The next prime is 13998631. The reversal of 13998617 is 71689931.

13998617 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5331481 + 8667136 = 2309^2 + 2944^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13998617 - 2² = 13998613 is a prime.

It is a super-3 number, since 3×13998617³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13998613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14213 + ... + 15165.

It is an arithmetic number, because the mean of its divisors is an integer number (1803537).

Almost surely, 2^13998617 is an apocalyptic number.

It is an amenable number.

13998617 is a deficient number, since it is larger than the sum of its proper divisors (429679).

13998617 is an equidigital number, since it uses as much as digits as its factorization.

13998617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1387.

The product of its digits is 81648, while the sum is 44.

The square root of 13998617 is about 3741.4725710608. The cubic root of 13998617 is about 241.0062899020.

The spelling of 13998617 in words is "thirteen million, nine hundred ninety-eight thousand, six hundred seventeen".