13980961 has 4 divisors (see below), whose sum is σ = 13989424. Its totient is φ = 13972500.

The previous prime is 13980947. The next prime is 13980971. The reversal of 13980961 is 16908931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 13980961 - 2¹³ = 13972769 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 13980961.

It is not an unprimeable number, because it can be changed into a prime (13980971) 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 3 ways as a sum of consecutive naturals, for example, 855 + ... + 5356.

It is an arithmetic number, because the mean of its divisors is an integer number (3497356).

Almost surely, 2^13980961 is an apocalyptic number.

It is an amenable number.

13980961 is a deficient number, since it is larger than the sum of its proper divisors (8463).

13980961 is an equidigital number, since it uses as much as digits as its factorization.

13980961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8462.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 13980961 is about 3739.1123278126. The cubic root of 13980961 is about 240.9049228100.

It can be divided in two parts, 13980 and 961, that added together give a palindrome (14941).

The spelling of 13980961 in words is "thirteen million, nine hundred eighty thousand, nine hundred sixty-one".