13489831 has 4 divisors (see below), whose sum is σ = 13803592. Its totient is φ = 13176072.

The previous prime is 13489783. The next prime is 13489837. The reversal of 13489831 is 13898431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13898431 = 2063 ⋅6737.

It is a cyclic number.

It is not a de Polignac number, because 13489831 - 2⁹ = 13489319 is a prime.

It is a super-2 number, since 2×13489831² = 363951080817122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13489837) 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, 156816 + ... + 156901.

It is an arithmetic number, because the mean of its divisors is an integer number (3450898).

Almost surely, 2^13489831 is an apocalyptic number.

13489831 is a deficient number, since it is larger than the sum of its proper divisors (313761).

13489831 is an equidigital number, since it uses as much as digits as its factorization.

13489831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313760.

The product of its digits is 20736, while the sum is 37.

The square root of 13489831 is about 3672.8505278598. The cubic root of 13489831 is about 238.0503565504.

The spelling of 13489831 in words is "thirteen million, four hundred eighty-nine thousand, eight hundred thirty-one".