13339978 has 8 divisors (see below), whose sum is σ = 20048580. Its totient is φ = 6657120.

The previous prime is 13339973. The next prime is 13339987. The reversal of 13339978 is 87993331.

13339978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11068929 + 2271049 = 3327^2 + 1507^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (13339973) 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, 5083 + ... + 7246.

Almost surely, 2^13339978 is an apocalyptic number.

13339978 is a deficient number, since it is larger than the sum of its proper divisors (6708602).

13339978 is a wasteful number, since it uses less digits than its factorization.

13339978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12872.

The product of its digits is 122472, while the sum is 43.

The square root of 13339978 is about 3652.3934618275. The cubic root of 13339978 is about 237.1656043750.

It can be divided in two parts, 1333 and 9978, that added together give a palindrome (11311).

The spelling of 13339978 in words is "thirteen million, three hundred thirty-nine thousand, nine hundred seventy-eight".