13988605349 has 4 divisors (see below), whose sum is σ = 14145780780. Its totient is φ = 13831429920.

The previous prime is 13988605331. The next prime is 13988605427. The reversal of 13988605349 is 94350688931.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6700568449 + 7288036900 = 81857^2 + 85370^2 .

It is a cyclic number.

It is not a de Polignac number, because 13988605349 - 2²⁰ = 13987556773 is a prime.

It is a super-2 number, since 2×13988605349² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13988605294 and 13988605303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13988604349) 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, 78587582 + ... + 78587759.

It is an arithmetic number, because the mean of its divisors is an integer number (3536445195).

Almost surely, 2^13988605349 is an apocalyptic number.

It is an amenable number.

13988605349 is a deficient number, since it is larger than the sum of its proper divisors (157175431).

13988605349 is an equidigital number, since it uses as much as digits as its factorization.

13988605349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157175430.

The product of its (nonzero) digits is 5598720, while the sum is 56.

The spelling of 13988605349 in words is "thirteen billion, nine hundred eighty-eight million, six hundred five thousand, three hundred forty-nine".