161088489 has 12 divisors (see below), whose sum is σ = 232800516. Its totient is φ = 107338272.

The previous prime is 161088469. The next prime is 161088503. The reversal of 161088489 is 984880161.

161088489 is a `hidden beast` number, since 161 + 0 + 8 + 8 + 489 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19954089 + 141134400 = 4467^2 + 11880^2 .

It is not a de Polignac number, because 161088489 - 2²¹ = 158991337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161088409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23587 + ... + 29639.

It is an arithmetic number, because the mean of its divisors is an integer number (19400043).

Almost surely, 2^161088489 is an apocalyptic number.

It is an amenable number.

161088489 is a deficient number, since it is larger than the sum of its proper divisors (71712027).

161088489 is a wasteful number, since it uses less digits than its factorization.

161088489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9016 (or 9013 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 45.

The square root of 161088489 is about 12692.0640165420. The cubic root of 161088489 is about 544.1118311487. Note that the first 3 decimals are identical.

The spelling of 161088489 in words is "one hundred sixty-one million, eighty-eight thousand, four hundred eighty-nine".