13691977 has 8 divisors (see below), whose sum is σ = 14814464. Its totient is φ = 12579408.

The previous prime is 13691963. The next prime is 13691981. The reversal of 13691977 is 77919631.

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

It is a cyclic number.

It is not a de Polignac number, because 13691977 - 2¹⁵ = 13659209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13691927) 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, 538 + ... + 5260.

It is an arithmetic number, because the mean of its divisors is an integer number (1851808).

Almost surely, 2^13691977 is an apocalyptic number.

It is an amenable number.

13691977 is a deficient number, since it is larger than the sum of its proper divisors (1122487).

13691977 is a wasteful number, since it uses less digits than its factorization.

13691977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4959.

The product of its digits is 71442, while the sum is 43.

The square root of 13691977 is about 3700.2671525175. The cubic root of 13691977 is about 239.2335328153.

The spelling of 13691977 in words is "thirteen million, six hundred ninety-one thousand, nine hundred seventy-seven".