13049989 has 4 divisors (see below), whose sum is σ = 13057324. Its totient is φ = 13042656.

The previous prime is 13049987. The next prime is 13050043. The reversal of 13049989 is 98994031.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 98994031 = 79 ⋅1253089.

It can be written as a sum of positive squares in 2 ways, for example, as 9180900 + 3869089 = 3030^2 + 1967^2 .

It is a cyclic number.

It is not a de Polignac number, because 13049989 - 2¹ = 13049987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13049987) 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, 889 + ... + 5185.

It is an arithmetic number, because the mean of its divisors is an integer number (3264331).

Almost surely, 2^13049989 is an apocalyptic number.

It is an amenable number.

13049989 is a deficient number, since it is larger than the sum of its proper divisors (7335).

13049989 is an equidigital number, since it uses as much as digits as its factorization.

13049989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7334.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 13049989 is about 3612.4768511369. The cubic root of 13049989 is about 235.4344701322.

The spelling of 13049989 in words is "thirteen million, forty-nine thousand, nine hundred eighty-nine".