13921895 has 32 divisors (see below), whose sum is σ = 19559232. Its totient is φ = 9418752.

The previous prime is 13921891. The next prime is 13921907. The reversal of 13921895 is 59812931.

It is a cyclic number.

It is not a de Polignac number, because 13921895 - 2² = 13921891 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13921891) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47369 + ... + 47661.

It is an arithmetic number, because the mean of its divisors is an integer number (611226).

Almost surely, 2^13921895 is an apocalyptic number.

13921895 is a deficient number, since it is larger than the sum of its proper divisors (5637337).

13921895 is a wasteful number, since it uses less digits than its factorization.

13921895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371.

The product of its digits is 19440, while the sum is 38.

The square root of 13921895 is about 3731.2055692497. The cubic root of 13921895 is about 240.5651899473.

The spelling of 13921895 in words is "thirteen million, nine hundred twenty-one thousand, eight hundred ninety-five".