13778073 has 8 divisors (see below), whose sum is σ = 20412000. Its totient is φ = 9185364.

The previous prime is 13778071. The next prime is 13778099. The reversal of 13778073 is 37087731.

It is a happy number.

13778073 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13778073 - 2¹ = 13778071 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13778071) 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, 255123 + ... + 255176.

It is an arithmetic number, because the mean of its divisors is an integer number (2551500).

Almost surely, 2^13778073 is an apocalyptic number.

It is an amenable number.

13778073 is a deficient number, since it is larger than the sum of its proper divisors (6633927).

13778073 is an equidigital number, since it uses as much as digits as its factorization.

13778073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510308 (or 510302 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 36.

The square root of 13778073 is about 3711.8826759476. The cubic root of 13778073 is about 239.7339238736.

It can be divided in two parts, 137 and 78073, that added together give a triangular number (78210 = T₃₉₅).

The spelling of 13778073 in words is "thirteen million, seven hundred seventy-eight thousand, seventy-three".