13821977 has 8 divisors (see below), whose sum is σ = 14958720. Its totient is φ = 12695760.

The previous prime is 13821971. The next prime is 13822007. The reversal of 13821977 is 77912831.

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 13821977 - 2¹⁴ = 13805593 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13821977.

It is not an unprimeable number, because it can be changed into a prime (13821971) 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, 224 + ... + 5262.

It is an arithmetic number, because the mean of its divisors is an integer number (1869840).

Almost surely, 2^13821977 is an apocalyptic number.

It is an amenable number.

13821977 is a deficient number, since it is larger than the sum of its proper divisors (1136743).

13821977 is a wasteful number, since it uses less digits than its factorization.

13821977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5263.

The product of its digits is 21168, while the sum is 38.

The square root of 13821977 is about 3717.7919522211. The cubic root of 13821977 is about 239.9882922530.

The spelling of 13821977 in words is "thirteen million, eight hundred twenty-one thousand, nine hundred seventy-seven".