13961947 has 4 divisors (see below), whose sum is σ = 14783256. Its totient is φ = 13140640.

The previous prime is 13961939. The next prime is 13961951. The reversal of 13961947 is 74916931.

13961947 is digitally balanced in base 3, 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, and also an emirpimes, since its reverse is a distinct semiprime: 74916931 = 53 ⋅1413527.

It is a cyclic number.

It is not a de Polignac number, because 13961947 - 2³ = 13961939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13961917) 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 in 3 ways as a sum of consecutive naturals, for example, 410629 + ... + 410662.

It is an arithmetic number, because the mean of its divisors is an integer number (3695814).

Almost surely, 2^13961947 is an apocalyptic number.

13961947 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

13961947 is a deficient number, since it is larger than the sum of its proper divisors (821309).

13961947 is an equidigital number, since it uses as much as digits as its factorization.

13961947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821308.

The product of its digits is 40824, while the sum is 40.

The square root of 13961947 is about 3736.5688806711. The cubic root of 13961947 is about 240.7956636471.

The spelling of 13961947 in words is "thirteen million, nine hundred sixty-one thousand, nine hundred forty-seven".