13940138 has 4 divisors (see below), whose sum is σ = 20910210. Its totient is φ = 6970068.

The previous prime is 13940117. The next prime is 13940177. The reversal of 13940138 is 83104931.

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

It can be written as a sum of positive squares in only one way, i.e., 7524049 + 6416089 = 2743^2 + 2533^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13940138.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3485033 + ... + 3485036.

Almost surely, 2^13940138 is an apocalyptic number.

13940138 is a deficient number, since it is larger than the sum of its proper divisors (6970072).

13940138 is an equidigital number, since it uses as much as digits as its factorization.

13940138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6970071.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 13940138 is about 3733.6494211428. The cubic root of 13940138 is about 240.6702215115.

The spelling of 13940138 in words is "thirteen million, nine hundred forty thousand, one hundred thirty-eight".