13779442 has 4 divisors (see below), whose sum is σ = 20669166. Its totient is φ = 6889720.

The previous prime is 13779439. The next prime is 13779449. The reversal of 13779442 is 24497731.

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., 13771521 + 7921 = 3711^2 + 89^2 .

It is not an unprimeable number, because it can be changed into a prime (13779449) 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, 3444859 + ... + 3444862.

Almost surely, 2^13779442 is an apocalyptic number.

13779442 is a deficient number, since it is larger than the sum of its proper divisors (6889724).

13779442 is an equidigital number, since it uses as much as digits as its factorization.

13779442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6889723.

The product of its digits is 42336, while the sum is 37.

The square root of 13779442 is about 3712.0670791353. The cubic root of 13779442 is about 239.7418636600.

The spelling of 13779442 in words is "thirteen million, seven hundred seventy-nine thousand, four hundred forty-two".