13779706 has 4 divisors (see below), whose sum is σ = 20669562. Its totient is φ = 6889852.

The previous prime is 13779683. The next prime is 13779709. The reversal of 13779706 is 60797731.

13779706 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, and also an emirpimes, since its reverse is a distinct semiprime: 60797731 = 53 ⋅1147127.

It can be written as a sum of positive squares in only one way, i.e., 8649481 + 5130225 = 2941^2 + 2265^2 .

It is not an unprimeable number, because it can be changed into a prime (13779709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3444925 + ... + 3444928.

Almost surely, 2^13779706 is an apocalyptic number.

13779706 is a deficient number, since it is larger than the sum of its proper divisors (6889856).

13779706 is an equidigital number, since it uses as much as digits as its factorization.

13779706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6889855.

The product of its (nonzero) digits is 55566, while the sum is 40.

The square root of 13779706 is about 3712.1026386672. The cubic root of 13779706 is about 239.7433947198.

The spelling of 13779706 in words is "thirteen million, seven hundred seventy-nine thousand, seven hundred six".