13954921 has 2 divisors, whose sum is σ = 13954922. Its totient is φ = 13954920.

The previous prime is 13954891. The next prime is 13954939. The reversal of 13954921 is 12945931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9272025 + 4682896 = 3045^2 + 2164^2 .

It is an emirp because it is prime and its reverse (12945931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13954921 - 2⁷ = 13954793 is a prime.

It is not a weakly prime, because it can be changed into another prime (13954021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6977460 + 6977461.

It is an arithmetic number, because the mean of its divisors is an integer number (6977461).

Almost surely, 2^13954921 is an apocalyptic number.

It is an amenable number.

13954921 is a deficient number, since it is larger than the sum of its proper divisors (1).

13954921 is an equidigital number, since it uses as much as digits as its factorization.

13954921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 34.

The square root of 13954921 is about 3735.6285950292. The cubic root of 13954921 is about 240.7552654084.

The spelling of 13954921 in words is "thirteen million, nine hundred fifty-four thousand, nine hundred twenty-one".