13543861 has 2 divisors, whose sum is σ = 13543862. Its totient is φ = 13543860.

The previous prime is 13543847. The next prime is 13543877. The reversal of 13543861 is 16834531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11015761 + 2528100 = 3319^2 + 1590^2 .

It is a cyclic number.

It is not a de Polignac number, because 13543861 - 2⁹ = 13543349 is a prime.

It is equal to p₈₈₂₂₈₃ and since 13543861 and 882283 have the same sum of digits, it is a Honaker prime.

It is a zygodrome in base 3.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13543801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6771930 + 6771931.

It is an arithmetic number, because the mean of its divisors is an integer number (6771931).

Almost surely, 2^13543861 is an apocalyptic number.

It is an amenable number.

13543861 is a deficient number, since it is larger than the sum of its proper divisors (1).

13543861 is an equidigital number, since it uses as much as digits as its factorization.

13543861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 31.

The square root of 13543861 is about 3680.1985000812. The cubic root of 13543861 is about 238.3677493891.

The spelling of 13543861 in words is "thirteen million, five hundred forty-three thousand, eight hundred sixty-one".