13788661 has 16 divisors (see below), whose sum is σ = 15321600. Its totient is φ = 12350448.

The previous prime is 13788653. The next prime is 13788673. The reversal of 13788661 is 16688731.

It is not a de Polignac number, because 13788661 - 2³ = 13788653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13788611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60630 + ... + 60856.

It is an arithmetic number, because the mean of its divisors is an integer number (957600).

Almost surely, 2^13788661 is an apocalyptic number.

It is an amenable number.

13788661 is a deficient number, since it is larger than the sum of its proper divisors (1532939).

13788661 is a wasteful number, since it uses less digits than its factorization.

13788661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408.

The product of its digits is 48384, while the sum is 40.

The square root of 13788661 is about 3713.3086324732. The cubic root of 13788661 is about 239.7953173854.

The spelling of 13788661 in words is "thirteen million, seven hundred eighty-eight thousand, six hundred sixty-one".