13679869 has 8 divisors (see below), whose sum is σ = 15953600. Its totient is φ = 11725308.

The previous prime is 13679833. The next prime is 13679873. The reversal of 13679869 is 96897631.

It is not a de Polignac number, because 13679869 - 2¹⁷ = 13548797 is a prime.

It is a super-2 number, since 2×13679869² = 374277631714322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13679819) 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, 19599 + ... + 20284.

It is an arithmetic number, because the mean of its divisors is an integer number (1994200).

Almost surely, 2^13679869 is an apocalyptic number.

It is an amenable number.

13679869 is a deficient number, since it is larger than the sum of its proper divisors (2273731).

13679869 is an frugal number, since it uses more digits than its factorization.

13679869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39904 (or 39890 counting only the distinct ones).

The product of its digits is 489888, while the sum is 49.

The square root of 13679869 is about 3698.6306925672. The cubic root of 13679869 is about 239.1629928711.

It can be divided in two parts, 1367 and 9869, that added together give a square (11236 = 106²).

The spelling of 13679869 in words is "thirteen million, six hundred seventy-nine thousand, eight hundred sixty-nine".