13978003834 has 4 divisors (see below), whose sum is σ = 20967005754. Its totient is φ = 6989001916.

The previous prime is 13978003811. The next prime is 13978003859. The reversal of 13978003834 is 43830087931.

It is a happy number.

13978003834 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 9477606609 + 4500397225 = 97353^2 + 67085^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3494500957 + ... + 3494500960.

Almost surely, 2^13978003834 is an apocalyptic number.

13978003834 is a deficient number, since it is larger than the sum of its proper divisors (6989001920).

13978003834 is an equidigital number, since it uses as much as digits as its factorization.

13978003834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6989001919.

The product of its (nonzero) digits is 435456, while the sum is 46.

The spelling of 13978003834 in words is "thirteen billion, nine hundred seventy-eight million, three thousand, eight hundred thirty-four".