13945169 has 4 divisors (see below), whose sum is σ = 15937344. Its totient is φ = 11952996.

The previous prime is 13945163. The next prime is 13945193. The reversal of 13945169 is 96154931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13945169 is a prime.

It is a super-2 number, since 2×13945169² = 388935476877122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13945163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 996077 + ... + 996090.

It is an arithmetic number, because the mean of its divisors is an integer number (3984336).

Almost surely, 2^13945169 is an apocalyptic number.

It is an amenable number.

13945169 is a deficient number, since it is larger than the sum of its proper divisors (1992175).

13945169 is an equidigital number, since it uses as much as digits as its factorization.

13945169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1992174.

The product of its digits is 29160, while the sum is 38.

The square root of 13945169 is about 3734.3230979657. The cubic root of 13945169 is about 240.6991706810.

The spelling of 13945169 in words is "thirteen million, nine hundred forty-five thousand, one hundred sixty-nine".