13478769 has 12 divisors (see below), whose sum is σ = 20097792. Its totient is φ = 8695800.

The previous prime is 13478761. The next prime is 13478779. The reversal of 13478769 is 96787431.

It is not a de Polignac number, because 13478769 - 2³ = 13478761 is a prime.

It is a super-2 number, since 2×13478769² = 363354427510722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13478761) 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, 23877 + ... + 24434.

It is an arithmetic number, because the mean of its divisors is an integer number (1674816).

Almost surely, 2^13478769 is an apocalyptic number.

It is an amenable number.

13478769 is a deficient number, since it is larger than the sum of its proper divisors (6619023).

13478769 is a wasteful number, since it uses less digits than its factorization.

13478769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48348 (or 48345 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 13478769 is about 3671.3443042025. The cubic root of 13478769 is about 237.9852696671.

The spelling of 13478769 in words is "thirteen million, four hundred seventy-eight thousand, seven hundred sixty-nine".