13961645 has 8 divisors (see below), whose sum is σ = 16774656. Its totient is φ = 11155536.

The previous prime is 13961639. The next prime is 13961657. The reversal of 13961645 is 54616931.

13961645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 13961645 - 2⁶ = 13961581 is a prime.

It is a super-3 number, since 3×13961645³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5444 + ... + 7586.

It is an arithmetic number, because the mean of its divisors is an integer number (2096832).

Almost surely, 2^13961645 is an apocalyptic number.

It is an amenable number.

13961645 is a deficient number, since it is larger than the sum of its proper divisors (2813011).

13961645 is a wasteful number, since it uses less digits than its factorization.

13961645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3451.

The product of its digits is 19440, while the sum is 35.

The square root of 13961645 is about 3736.5284690472. The cubic root of 13961645 is about 240.7939274801.

The spelling of 13961645 in words is "thirteen million, nine hundred sixty-one thousand, six hundred forty-five".