13961938 has 4 divisors (see below), whose sum is σ = 20942910. Its totient is φ = 6980968.

The previous prime is 13961933. The next prime is 13961939. The reversal of 13961938 is 83916931.

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., 13373649 + 588289 = 3657^2 + 767^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13961938.

It is not an unprimeable number, because it can be changed into a prime (13961933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3490483 + ... + 3490486.

Almost surely, 2^13961938 is an apocalyptic number.

13961938 is a deficient number, since it is larger than the sum of its proper divisors (6980972).

13961938 is an equidigital number, since it uses as much as digits as its factorization.

13961938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6980971.

The product of its digits is 34992, while the sum is 40.

The square root of 13961938 is about 3736.5676763575. The cubic root of 13961938 is about 240.7956119074.

The spelling of 13961938 in words is "thirteen million, nine hundred sixty-one thousand, nine hundred thirty-eight".