13863947 has 4 divisors (see below), whose sum is σ = 14039520. Its totient is φ = 13688376.

The previous prime is 13863929. The next prime is 13863953. The reversal of 13863947 is 74936831.

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

It is a cyclic number.

It is not a de Polignac number, because 13863947 - 2¹² = 13859851 is a prime.

It is a super-3 number, since 3×13863947³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13863907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87668 + ... + 87825.

It is an arithmetic number, because the mean of its divisors is an integer number (3509880).

Almost surely, 2^13863947 is an apocalyptic number.

13863947 is a deficient number, since it is larger than the sum of its proper divisors (175573).

13863947 is an equidigital number, since it uses as much as digits as its factorization.

13863947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175572.

The product of its digits is 108864, while the sum is 41.

The square root of 13863947 is about 3723.4321532693. The cubic root of 13863947 is about 240.2309524513.

The spelling of 13863947 in words is "thirteen million, eight hundred sixty-three thousand, nine hundred forty-seven".