13911963 has 32 divisors (see below), whose sum is σ = 21245952. Its totient is φ = 8035200.

The previous prime is 13911949. The next prime is 13911973. The reversal of 13911963 is 36911931.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-13911963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13911913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44578 + ... + 44888.

It is an arithmetic number, because the mean of its divisors is an integer number (663936).

Almost surely, 2^13911963 is an apocalyptic number.

13911963 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

13911963 is a deficient number, since it is larger than the sum of its proper divisors (7333989).

13911963 is a wasteful number, since it uses less digits than its factorization.

13911963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395.

The product of its digits is 4374, while the sum is 33.

The square root of 13911963 is about 3729.8743946680. The cubic root of 13911963 is about 240.5079692439.

The spelling of 13911963 in words is "thirteen million, nine hundred eleven thousand, nine hundred sixty-three".