13771889 has 4 divisors (see below), whose sum is σ = 13811700. Its totient is φ = 13732080.

The previous prime is 13771847. The next prime is 13771907. The reversal of 13771889 is 98817731.

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 7182400 + 6589489 = 2680^2 + 2567^2 .

It is a cyclic number.

It is not a de Polignac number, because 13771889 - 2⁸ = 13771633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13771829) 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, 19382 + ... + 20079.

It is an arithmetic number, because the mean of its divisors is an integer number (3452925).

Almost surely, 2^13771889 is an apocalyptic number.

It is an amenable number.

13771889 is a deficient number, since it is larger than the sum of its proper divisors (39811).

13771889 is an equidigital number, since it uses as much as digits as its factorization.

13771889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39810.

The product of its digits is 84672, while the sum is 44.

The square root of 13771889 is about 3711.0495819916. The cubic root of 13771889 is about 239.6980519864.

The spelling of 13771889 in words is "thirteen million, seven hundred seventy-one thousand, eight hundred eighty-nine".