13881773 has 2 divisors, whose sum is σ = 13881774. Its totient is φ = 13881772.

The previous prime is 13881757. The next prime is 13881781. The reversal of 13881773 is 37718831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11744329 + 2137444 = 3427^2 + 1462^2 .

It is an emirp because it is prime and its reverse (37718831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13881773 - 2⁴ = 13881757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13881713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6940886 + 6940887.

It is an arithmetic number, because the mean of its divisors is an integer number (6940887).

Almost surely, 2^13881773 is an apocalyptic number.

It is an amenable number.

13881773 is a deficient number, since it is larger than the sum of its proper divisors (1).

13881773 is an equidigital number, since it uses as much as digits as its factorization.

13881773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 38.

The square root of 13881773 is about 3725.8251435085. The cubic root of 13881773 is about 240.3338698210. Note that the first 3 decimals are identical.

The spelling of 13881773 in words is "thirteen million, eight hundred eighty-one thousand, seven hundred seventy-three".