13670681 has 4 divisors (see below), whose sum is σ = 13835472. Its totient is φ = 13505892.

The previous prime is 13670651. The next prime is 13670707. The reversal of 13670681 is 18607631.

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.

It is a cyclic number.

It is not a de Polignac number, because 13670681 - 2⁶ = 13670617 is a prime.

It is a super-2 number, since 2×13670681² = 373775038007522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13670611) 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, 82271 + ... + 82436.

It is an arithmetic number, because the mean of its divisors is an integer number (3458868).

Almost surely, 2^13670681 is an apocalyptic number.

It is an amenable number.

13670681 is a deficient number, since it is larger than the sum of its proper divisors (164791).

13670681 is an equidigital number, since it uses as much as digits as its factorization.

13670681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164790.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 13670681 is about 3697.3884026431. The cubic root of 13670681 is about 239.1094367606.

The spelling of 13670681 in words is "thirteen million, six hundred seventy thousand, six hundred eighty-one".