13776989 has 8 divisors (see below), whose sum is σ = 14277120. Its totient is φ = 13280400.

The previous prime is 13776949. The next prime is 13777003. The reversal of 13776989 is 98967731.

13776989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 13776989 - 2⁸ = 13776733 is a prime.

It is a super-2 number, since 2×13776989² = 379610851812242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13776929) 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, 8927 + ... + 10355.

It is an arithmetic number, because the mean of its divisors is an integer number (1784640).

Almost surely, 2^13776989 is an apocalyptic number.

It is an amenable number.

13776989 is a deficient number, since it is larger than the sum of its proper divisors (500131).

13776989 is a wasteful number, since it uses less digits than its factorization.

13776989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1771.

The product of its digits is 571536, while the sum is 50.

The square root of 13776989 is about 3711.7366555293. The cubic root of 13776989 is about 239.7276366279.

The spelling of 13776989 in words is "thirteen million, seven hundred seventy-six thousand, nine hundred eighty-nine".