13745969 has 4 divisors (see below), whose sum is σ = 13874544. Its totient is φ = 13617396.

The previous prime is 13745959. The next prime is 13745993. The reversal of 13745969 is 96954731.

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 not a de Polignac number, because 13745969 - 2²⁰ = 12697393 is a prime.

It is a super-2 number, since 2×13745969² = 377903327497922, 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 (13745929) 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, 64127 + ... + 64340.

It is an arithmetic number, because the mean of its divisors is an integer number (3468636).

Almost surely, 2^13745969 is an apocalyptic number.

It is an amenable number.

13745969 is a deficient number, since it is larger than the sum of its proper divisors (128575).

13745969 is a wasteful number, since it uses less digits than its factorization.

13745969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128574.

The product of its digits is 204120, while the sum is 44.

The square root of 13745969 is about 3707.5556637763. Note that the first 3 decimals coincide. The cubic root of 13745969 is about 239.5475793972.

The spelling of 13745969 in words is "thirteen million, seven hundred forty-five thousand, nine hundred sixty-nine".