13868779 has 4 divisors (see below), whose sum is σ = 13921776. Its totient is φ = 13815784.

The previous prime is 13868773. The next prime is 13868797. The reversal of 13868779 is 97786831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97786831 = 9181 ⋅10651.

It is a cyclic number.

It is not a de Polignac number, because 13868779 - 2¹⁷ = 13737707 is a prime.

It is a super-5 number, since 5×13868779⁵ (a number of 37 digits) contains 55555 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13868773) 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, 26104 + ... + 26629.

It is an arithmetic number, because the mean of its divisors is an integer number (3480444).

Almost surely, 2^13868779 is an apocalyptic number.

13868779 is a deficient number, since it is larger than the sum of its proper divisors (52997).

13868779 is an equidigital number, since it uses as much as digits as its factorization.

13868779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52996.

The product of its digits is 508032, while the sum is 49.

The square root of 13868779 is about 3724.0809604519. The cubic root of 13868779 is about 240.2588584324.

The spelling of 13868779 in words is "thirteen million, eight hundred sixty-eight thousand, seven hundred seventy-nine".