13877989 has 4 divisors (see below), whose sum is σ = 14005420. Its totient is φ = 13750560.

The previous prime is 13877971. The next prime is 13878017. The reversal of 13877989 is 98977831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98977831 = 127 ⋅779353.

It can be written as a sum of positive squares in 2 ways, for example, as 11847364 + 2030625 = 3442^2 + 1425^2 .

It is a cyclic number.

It is not a de Polignac number, because 13877989 - 2¹⁷ = 13746917 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 (13877909) 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, 63552 + ... + 63769.

It is an arithmetic number, because the mean of its divisors is an integer number (3501355).

Almost surely, 2^13877989 is an apocalyptic number.

It is an amenable number.

13877989 is a deficient number, since it is larger than the sum of its proper divisors (127431).

13877989 is a wasteful number, since it uses less digits than its factorization.

13877989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127430.

The product of its digits is 762048, while the sum is 52.

The square root of 13877989 is about 3725.3173019221. The cubic root of 13877989 is about 240.3120304875.

The spelling of 13877989 in words is "thirteen million, eight hundred seventy-seven thousand, nine hundred eighty-nine".