13870829 has 4 divisors (see below), whose sum is σ = 15852384. Its totient is φ = 11889276.

The previous prime is 13870807. The next prime is 13870837. The reversal of 13870829 is 92807831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 92807831 = 31 ⋅2993801.

It is not a de Polignac number, because 13870829 - 2¹⁶ = 13805293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13870792 and 13870801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13870849) 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, 990767 + ... + 990780.

It is an arithmetic number, because the mean of its divisors is an integer number (3963096).

Almost surely, 2^13870829 is an apocalyptic number.

It is an amenable number.

13870829 is a deficient number, since it is larger than the sum of its proper divisors (1981555).

13870829 is an equidigital number, since it uses as much as digits as its factorization.

13870829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1981554.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 13870829 is about 3724.3561859736. The cubic root of 13870829 is about 240.2706957252.

The spelling of 13870829 in words is "thirteen million, eight hundred seventy thousand, eight hundred twenty-nine".