13881047 has 2 divisors, whose sum is σ = 13881048. Its totient is φ = 13881046.

The previous prime is 13881037. The next prime is 13881059. The reversal of 13881047 is 74018831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13881047 - 2¹⁰ = 13880023 is a prime.

It is equal to p₉₀₂₈₇₆ and since 13881047 and 902876 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13881017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6940523 + 6940524.

It is an arithmetic number, because the mean of its divisors is an integer number (6940524).

Almost surely, 2^13881047 is an apocalyptic number.

13881047 is a deficient number, since it is larger than the sum of its proper divisors (1).

13881047 is an equidigital number, since it uses as much as digits as its factorization.

13881047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 13881047 is about 3725.7277141520. The cubic root of 13881047 is about 240.3296800240.

Adding to 13881047 its reverse (74018831), we get a palindrome (87899878).

The spelling of 13881047 in words is "thirteen million, eight hundred eighty-one thousand, forty-seven".