13681977 has 8 divisors (see below), whose sum is σ = 18311040. Its totient is φ = 9087120.

The previous prime is 13681961. The next prime is 13681979. The reversal of 13681977 is 77918631.

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

It is not a de Polignac number, because 13681977 - 2⁴ = 13681961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13681979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7602 + ... + 9227.

It is an arithmetic number, because the mean of its divisors is an integer number (2288880).

Almost surely, 2^13681977 is an apocalyptic number.

It is an amenable number.

13681977 is a deficient number, since it is larger than the sum of its proper divisors (4629063).

13681977 is a wasteful number, since it uses less digits than its factorization.

13681977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17103.

The product of its digits is 63504, while the sum is 42.

The square root of 13681977 is about 3698.9156519175. The cubic root of 13681977 is about 239.1752768507.

The spelling of 13681977 in words is "thirteen million, six hundred eighty-one thousand, nine hundred seventy-seven".