13780775 has 6 divisors (see below), whose sum is σ = 17088192. Its totient is φ = 11024600.

The previous prime is 13780763. The next prime is 13780783. The reversal of 13780775 is 57708731.

13780775 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13780775 - 2⁴ = 13780759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 275591 + ... + 275640.

It is an arithmetic number, because the mean of its divisors is an integer number (2848032).

Almost surely, 2^13780775 is an apocalyptic number.

13780775 is a deficient number, since it is larger than the sum of its proper divisors (3307417).

13780775 is an equidigital number, since it uses as much as digits as its factorization.

13780775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551241 (or 551236 counting only the distinct ones).

The product of its (nonzero) digits is 41160, while the sum is 38.

The square root of 13780775 is about 3712.2466243503. The cubic root of 13780775 is about 239.7495941521.

The spelling of 13780775 in words is "thirteen million, seven hundred eighty thousand, seven hundred seventy-five".