13478999 has 4 divisors (see below), whose sum is σ = 14188440. Its totient is φ = 12769560.

The previous prime is 13478981. The next prime is 13479001. The reversal of 13478999 is 99987431.

13478999 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13478999 - 2²⁰ = 12430423 is a prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13478929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 354692 + ... + 354729.

It is an arithmetic number, because the mean of its divisors is an integer number (3547110).

Almost surely, 2^13478999 is an apocalyptic number.

13478999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

13478999 is a deficient number, since it is larger than the sum of its proper divisors (709441).

13478999 is an equidigital number, since it uses as much as digits as its factorization.

13478999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709440.

The product of its digits is 489888, while the sum is 50.

The square root of 13478999 is about 3671.3756277450. The cubic root of 13478999 is about 237.9866233096.

The spelling of 13478999 in words is "thirteen million, four hundred seventy-eight thousand, nine hundred ninety-nine".