1349459989 has 4 divisors (see below), whose sum is σ = 1349534124. Its totient is φ = 1349385856.

The previous prime is 1349459957. The next prime is 1349459999. The reversal of 1349459989 is 9899549431.

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.

It can be written as a sum of positive squares in 2 ways, for example, as 78180964 + 1271279025 = 8842^2 + 35655^2 .

It is a cyclic number.

It is not a de Polignac number, because 1349459989 - 2⁵ = 1349459957 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 (1349459939) 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, 11109 + ... + 53125.

It is an arithmetic number, because the mean of its divisors is an integer number (337383531).

Almost surely, 2^1349459989 is an apocalyptic number.

It is an amenable number.

1349459989 is a deficient number, since it is larger than the sum of its proper divisors (74135).

1349459989 is an equidigital number, since it uses as much as digits as its factorization.

1349459989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74134.

The product of its digits is 12597120, while the sum is 61.

The square root of 1349459989 is about 36734.9967878044. The cubic root of 1349459989 is about 1105.0620656770.

The spelling of 1349459989 in words is "one billion, three hundred forty-nine million, four hundred fifty-nine thousand, nine hundred eighty-nine".