13880981 has 2 divisors, whose sum is σ = 13880982. Its totient is φ = 13880980.

The previous prime is 13880969. The next prime is 13881013. The reversal of 13880981 is 18908831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13256881 + 624100 = 3641^2 + 790^2 .

It is a cyclic number.

It is not a de Polignac number, because 13880981 - 2¹⁸ = 13618837 is a prime.

It is a super-2 number, since 2×13880981² = 385363267044722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13885981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6940490 + 6940491.

It is an arithmetic number, because the mean of its divisors is an integer number (6940491).

Almost surely, 2^13880981 is an apocalyptic number.

It is an amenable number.

13880981 is a deficient number, since it is larger than the sum of its proper divisors (1).

13880981 is an equidigital number, since it uses as much as digits as its factorization.

13880981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 38.

The square root of 13880981 is about 3725.7188568114. The cubic root of 13880981 is about 240.3292991261.

The spelling of 13880981 in words is "thirteen million, eight hundred eighty thousand, nine hundred eighty-one".