13780943 has 8 divisors (see below), whose sum is σ = 15102720. Its totient is φ = 12470680.

The previous prime is 13780939. The next prime is 13780951. The reversal of 13780943 is 34908731.

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

It is a cyclic number.

It is not a de Polignac number, because 13780943 - 2² = 13780939 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13780903) 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, 263 + ... + 5256.

It is an arithmetic number, because the mean of its divisors is an integer number (1887840).

Almost surely, 2^13780943 is an apocalyptic number.

13780943 is a deficient number, since it is larger than the sum of its proper divisors (1321777).

13780943 is a wasteful number, since it uses less digits than its factorization.

13780943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5757.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 13780943 is about 3712.2692520883. The cubic root of 13780943 is about 239.7505684023.

The spelling of 13780943 in words is "thirteen million, seven hundred eighty thousand, nine hundred forty-three".