161135489 has 8 divisors (see below), whose sum is σ = 166529280. Its totient is φ = 155754000.

The previous prime is 161135459. The next prime is 161135519. The reversal of 161135489 is 984531161.

161135489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (161135459) and next prime (161135519).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161135489 - 2¹² = 161131393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161135449) 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, 29039 + ... + 34139.

It is an arithmetic number, because the mean of its divisors is an integer number (20816160).

Almost surely, 2^161135489 is an apocalyptic number.

It is an amenable number.

161135489 is a deficient number, since it is larger than the sum of its proper divisors (5393791).

161135489 is a wasteful number, since it uses less digits than its factorization.

161135489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6151.

The product of its digits is 25920, while the sum is 38.

The square root of 161135489 is about 12693.9154322061. The cubic root of 161135489 is about 544.1647436183.

The spelling of 161135489 in words is "one hundred sixty-one million, one hundred thirty-five thousand, four hundred eighty-nine".