13905971 has 4 divisors (see below), whose sum is σ = 13928112. Its totient is φ = 13883832.

The previous prime is 13905959. The next prime is 13906001. The reversal of 13905971 is 17950931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13905971 - 2⁶ = 13905907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15905971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10100 + ... + 11393.

It is an arithmetic number, because the mean of its divisors is an integer number (3482028).

Almost surely, 2^13905971 is an apocalyptic number.

13905971 is a deficient number, since it is larger than the sum of its proper divisors (22141).

13905971 is an equidigital number, since it uses as much as digits as its factorization.

13905971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22140.

The product of its (nonzero) digits is 8505, while the sum is 35.

The square root of 13905971 is about 3729.0710639515. The cubic root of 13905971 is about 240.4734346805.

The spelling of 13905971 in words is "thirteen million, nine hundred five thousand, nine hundred seventy-one".