13945691 has 8 divisors (see below), whose sum is σ = 14448000. Its totient is φ = 13446720.

The previous prime is 13945681. The next prime is 13945709. The reversal of 13945691 is 19654931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13945691 - 2¹⁸ = 13683547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13945651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10175 + ... + 11463.

It is an arithmetic number, because the mean of its divisors is an integer number (1806000).

Almost surely, 2^13945691 is an apocalyptic number.

13945691 is a deficient number, since it is larger than the sum of its proper divisors (502309).

13945691 is a wasteful number, since it uses less digits than its factorization.

13945691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1669.

The product of its digits is 29160, while the sum is 38.

The square root of 13945691 is about 3734.3929894964. The cubic root of 13945691 is about 240.7021739528.

The spelling of 13945691 in words is "thirteen million, nine hundred forty-five thousand, six hundred ninety-one".