13978773 has 12 divisors (see below), whose sum is σ = 20225920. Its totient is φ = 9303336.

The previous prime is 13978759. The next prime is 13978793. The reversal of 13978773 is 37787931.

13978773 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 13978773 - 2¹² = 13974677 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 (13978753) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7068 + ... + 8826.

Almost surely, 2^13978773 is an apocalyptic number.

It is an amenable number.

13978773 is a deficient number, since it is larger than the sum of its proper divisors (6247147).

13978773 is a wasteful number, since it uses less digits than its factorization.

13978773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2648 (or 2645 counting only the distinct ones).

The product of its digits is 222264, while the sum is 45.

The square root of 13978773 is about 3738.8197335523. The cubic root of 13978773 is about 240.8923550647.

The spelling of 13978773 in words is "thirteen million, nine hundred seventy-eight thousand, seven hundred seventy-three".