13909642 has 8 divisors (see below), whose sum is σ = 20897316. Its totient is φ = 6943872.

The previous prime is 13909633. The next prime is 13909657. The reversal of 13909642 is 24690931.

13909642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 13315201 + 594441 = 3649^2 + 771^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 13909598 and 13909607.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3783 + ... + 6490.

Almost surely, 2^13909642 is an apocalyptic number.

13909642 is a deficient number, since it is larger than the sum of its proper divisors (6987674).

13909642 is a wasteful number, since it uses less digits than its factorization.

13909642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10952.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 13909642 is about 3729.5632452071. The cubic root of 13909642 is about 240.4945934645.

The spelling of 13909642 in words is "thirteen million, nine hundred nine thousand, six hundred forty-two".