13679779 has 4 divisors (see below), whose sum is σ = 14274576. Its totient is φ = 13084984.

The previous prime is 13679767. The next prime is 13679789. The reversal of 13679779 is 97797631.

13679779 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: 97797631 = 97 ⋅1008223.

It is a cyclic number.

It is not a de Polignac number, because 13679779 - 2¹⁷ = 13548707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13679749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 297364 + ... + 297409.

It is an arithmetic number, because the mean of its divisors is an integer number (3568644).

Almost surely, 2^13679779 is an apocalyptic number.

13679779 is a deficient number, since it is larger than the sum of its proper divisors (594797).

13679779 is an equidigital number, since it uses as much as digits as its factorization.

13679779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594796.

The product of its digits is 500094, while the sum is 49.

The square root of 13679779 is about 3698.6185258823. The cubic root of 13679779 is about 239.1624683846.

The spelling of 13679779 in words is "thirteen million, six hundred seventy-nine thousand, seven hundred seventy-nine".