13865212379 has 4 divisors (see below), whose sum is σ = 13869574320. Its totient is φ = 13860850440.

The previous prime is 13865212363. The next prime is 13865212421. The reversal of 13865212379 is 97321256831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97321256831 = 41 ⋅2373689191.

It is a cyclic number.

It is not a de Polignac number, because 13865212379 - 2⁴ = 13865212363 is a prime.

It is a super-2 number, since 2×13865212379² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13865212979) 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, 2176199 + ... + 2182560.

It is an arithmetic number, because the mean of its divisors is an integer number (3467393580).

Almost surely, 2^13865212379 is an apocalyptic number.

13865212379 is a deficient number, since it is larger than the sum of its proper divisors (4361941).

13865212379 is an equidigital number, since it uses as much as digits as its factorization.

13865212379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4361940.

The product of its digits is 544320, while the sum is 47.

The spelling of 13865212379 in words is "thirteen billion, eight hundred sixty-five million, two hundred twelve thousand, three hundred seventy-nine".