13348781 has 4 divisors (see below), whose sum is σ = 13536864. Its totient is φ = 13160700.

The previous prime is 13348771. The next prime is 13348793. The reversal of 13348781 is 18784331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18784331 = 19 ⋅988649.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13348781 is a prime.

It is a super-2 number, since 2×13348781² = 356379908371922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13348771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93935 + ... + 94076.

It is an arithmetic number, because the mean of its divisors is an integer number (3384216).

Almost surely, 2^13348781 is an apocalyptic number.

It is an amenable number.

13348781 is a deficient number, since it is larger than the sum of its proper divisors (188083).

13348781 is an equidigital number, since it uses as much as digits as its factorization.

13348781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188082.

The product of its digits is 16128, while the sum is 35.

The square root of 13348781 is about 3653.5983632578. The cubic root of 13348781 is about 237.2177611264.

The spelling of 13348781 in words is "thirteen million, three hundred forty-eight thousand, seven hundred eighty-one".