13105779 has 4 divisors (see below), whose sum is σ = 17474376. Its totient is φ = 8737184.

The previous prime is 13105753. The next prime is 13105811. The reversal of 13105779 is 97750131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97750131 = 3 ⋅32583377.

It is a cyclic number.

It is not a de Polignac number, because 13105779 - 2⁵ = 13105747 is a prime.

It is a super-2 number, since 2×13105779² = 343522886393682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13105739) 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, 2184294 + ... + 2184299.

It is an arithmetic number, because the mean of its divisors is an integer number (4368594).

Almost surely, 2^13105779 is an apocalyptic number.

13105779 is a deficient number, since it is larger than the sum of its proper divisors (4368597).

13105779 is an equidigital number, since it uses as much as digits as its factorization.

13105779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4368596.

The product of its (nonzero) digits is 6615, while the sum is 33.

The square root of 13105779 is about 3620.1904646027. The cubic root of 13105779 is about 235.7694950830.

The spelling of 13105779 in words is "thirteen million, one hundred five thousand, seven hundred seventy-nine".