13921963 has 8 divisors (see below), whose sum is σ = 16081200. Its totient is φ = 11911680.

The previous prime is 13921961. The next prime is 13921979. The reversal of 13921963 is 36912931.

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

It is not a de Polignac number, because 13921963 - 2¹ = 13921961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13921961) 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, 37038 + ... + 37411.

It is an arithmetic number, because the mean of its divisors is an integer number (2010150).

Almost surely, 2^13921963 is an apocalyptic number.

13921963 is a deficient number, since it is larger than the sum of its proper divisors (2159237).

13921963 is a wasteful number, since it uses less digits than its factorization.

13921963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74477.

The product of its digits is 8748, while the sum is 34.

The square root of 13921963 is about 3731.2146815749. The cubic root of 13921963 is about 240.5655816182.

It can be divided in two parts, 13921 and 963, that added together give a square (14884 = 122²).

The spelling of 13921963 in words is "thirteen million, nine hundred twenty-one thousand, nine hundred sixty-three".