13929961 has 2 divisors, whose sum is σ = 13929962. Its totient is φ = 13929960.

The previous prime is 13929913. The next prime is 13929967. The reversal of 13929961 is 16992931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13395600 + 534361 = 3660^2 + 731^2 .

It is a cyclic number.

It is not a de Polignac number, because 13929961 - 2⁹ = 13929449 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13929967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6964980 + 6964981.

It is an arithmetic number, because the mean of its divisors is an integer number (6964981).

Almost surely, 2^13929961 is an apocalyptic number.

It is an amenable number.

13929961 is a deficient number, since it is larger than the sum of its proper divisors (1).

13929961 is an equidigital number, since it uses as much as digits as its factorization.

13929961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26244, while the sum is 40.

The square root of 13929961 is about 3732.2862966284. The cubic root of 13929961 is about 240.6116401420.

The spelling of 13929961 in words is "thirteen million, nine hundred twenty-nine thousand, nine hundred sixty-one".