13168641 has 4 divisors (see below), whose sum is σ = 17558192. Its totient is φ = 8779092.

The previous prime is 13168637. The next prime is 13168643. The reversal of 13168641 is 14686131.

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: 14686131 = 3 ⋅4895377.

It is not a de Polignac number, because 13168641 - 2² = 13168637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13168599 and 13168608.

It is not an unprimeable number, because it can be changed into a prime (13168643) 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, 2194771 + ... + 2194776.

It is an arithmetic number, because the mean of its divisors is an integer number (4389548).

It is a Proth number, since it is equal to 3215 ⋅ 2¹² + 1 and 3215 < 2¹².

Almost surely, 2^13168641 is an apocalyptic number.

It is an amenable number.

13168641 is a deficient number, since it is larger than the sum of its proper divisors (4389551).

13168641 is an equidigital number, since it uses as much as digits as its factorization.

13168641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4389550.

The product of its digits is 3456, while the sum is 30.

The square root of 13168641 is about 3628.8622183820. The cubic root of 13168641 is about 236.1458509048.

The spelling of 13168641 in words is "thirteen million, one hundred sixty-eight thousand, six hundred forty-one".