13444691 has 4 divisors (see below), whose sum is σ = 14478912. Its totient is φ = 12410472.

The previous prime is 13444663. The next prime is 13444721. The reversal of 13444691 is 19644431.

It is a happy number.

13444691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19644431 = 4177 ⋅4703.

It is a cyclic number.

It is not a de Polignac number, because 13444691 - 2²² = 9250387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13444621) 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, 517091 + ... + 517116.

It is an arithmetic number, because the mean of its divisors is an integer number (3619728).

Almost surely, 2^13444691 is an apocalyptic number.

13444691 is a deficient number, since it is larger than the sum of its proper divisors (1034221).

13444691 is a wasteful number, since it uses less digits than its factorization.

13444691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034220.

The product of its digits is 10368, while the sum is 32.

The square root of 13444691 is about 3666.7002877246. The cubic root of 13444691 is about 237.7845365376.

The spelling of 13444691 in words is "thirteen million, four hundred forty-four thousand, six hundred ninety-one".