13939418 has 8 divisors (see below), whose sum is σ = 20932020. Its totient is φ = 6962080.

The previous prime is 13939411. The next prime is 13939463. The reversal of 13939418 is 81493931.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12623809 + 1315609 = 3553^2 + 1147^2 .

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 (13939411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1163 + ... + 5406.

Almost surely, 2^13939418 is an apocalyptic number.

13939418 is a deficient number, since it is larger than the sum of its proper divisors (6992602).

13939418 is a wasteful number, since it uses less digits than its factorization.

13939418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7632.

The product of its digits is 23328, while the sum is 38.

The square root of 13939418 is about 3733.5529994899. The cubic root of 13939418 is about 240.6660779480. Note that the first 3 decimals are identical.

The spelling of 13939418 in words is "thirteen million, nine hundred thirty-nine thousand, four hundred eighteen".