13979961 has 6 divisors (see below), whose sum is σ = 20193290. Its totient is φ = 9319968.

The previous prime is 13979951. The next prime is 13979963. The reversal of 13979961 is 16997931.

13979961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 13461561 + 518400 = 3669^2 + 720^2 .

It is not a de Polignac number, because 13979961 - 2¹⁷ = 13848889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13979963) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 776656 + ... + 776673.

Almost surely, 2^13979961 is an apocalyptic number.

It is an amenable number.

13979961 is a deficient number, since it is larger than the sum of its proper divisors (6213329).

13979961 is a wasteful number, since it uses less digits than its factorization.

13979961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1553335 (or 1553332 counting only the distinct ones).

The product of its digits is 91854, while the sum is 45.

The square root of 13979961 is about 3738.9786038436. The cubic root of 13979961 is about 240.8991790306.

The spelling of 13979961 in words is "thirteen million, nine hundred seventy-nine thousand, nine hundred sixty-one".