13979505 has 8 divisors (see below), whose sum is σ = 22367232. Its totient is φ = 7455728.

The previous prime is 13979503. The next prime is 13979507. The reversal of 13979505 is 50597931.

It is an interprime number because it is at equal distance from previous prime (13979503) and next prime (13979507).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13979505 - 2¹ = 13979503 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13979501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 465969 + ... + 465998.

It is an arithmetic number, because the mean of its divisors is an integer number (2795904).

Almost surely, 2^13979505 is an apocalyptic number.

13979505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13979505 is a deficient number, since it is larger than the sum of its proper divisors (8387727).

13979505 is an equidigital number, since it uses as much as digits as its factorization.

13979505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931975.

The product of its (nonzero) digits is 42525, while the sum is 39.

The square root of 13979505 is about 3738.9176241260. The cubic root of 13979505 is about 240.8965597763.

The spelling of 13979505 in words is "thirteen million, nine hundred seventy-nine thousand, five hundred five".