13986961 has 4 divisors (see below), whose sum is σ = 14469300. Its totient is φ = 13504624.

The previous prime is 13986943. The next prime is 13986977. The reversal of 13986961 is 16968931.

13986961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4494400 + 9492561 = 2120^2 + 3081^2 .

It is a cyclic number.

It is not a de Polignac number, because 13986961 - 2¹¹ = 13984913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13986901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 241126 + ... + 241183.

It is an arithmetic number, because the mean of its divisors is an integer number (3617325).

Almost surely, 2^13986961 is an apocalyptic number.

It is an amenable number.

13986961 is a deficient number, since it is larger than the sum of its proper divisors (482339).

13986961 is an equidigital number, since it uses as much as digits as its factorization.

13986961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482338.

The product of its digits is 69984, while the sum is 43.

The square root of 13986961 is about 3739.9145712168. The cubic root of 13986961 is about 240.9393797359.

The spelling of 13986961 in words is "thirteen million, nine hundred eighty-six thousand, nine hundred sixty-one".