13989454 has 4 divisors (see below), whose sum is σ = 20984184. Its totient is φ = 6994726.

The previous prime is 13989449. The next prime is 13989457. The reversal of 13989454 is 45498931.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 13989454.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13989457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3497362 + ... + 3497365.

It is an arithmetic number, because the mean of its divisors is an integer number (5246046).

Almost surely, 2^13989454 is an apocalyptic number.

13989454 is a deficient number, since it is larger than the sum of its proper divisors (6994730).

13989454 is an equidigital number, since it uses as much as digits as its factorization.

13989454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6994729.

The product of its digits is 155520, while the sum is 43.

The square root of 13989454 is about 3740.2478527499. The cubic root of 13989454 is about 240.9536936909.

The spelling of 13989454 in words is "thirteen million, nine hundred eighty-nine thousand, four hundred fifty-four".