161038489 has 2 divisors, whose sum is σ = 161038490. Its totient is φ = 161038488.

The previous prime is 161038477. The next prime is 161038517. The reversal of 161038489 is 984830161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102010000 + 59028489 = 10100^2 + 7683^2 .

It is a cyclic number.

It is not a de Polignac number, because 161038489 - 2⁵ = 161038457 is a prime.

It is not a weakly prime, because it can be changed into another prime (161036489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80519244 + 80519245.

It is an arithmetic number, because the mean of its divisors is an integer number (80519245).

Almost surely, 2^161038489 is an apocalyptic number.

It is an amenable number.

161038489 is a deficient number, since it is larger than the sum of its proper divisors (1).

161038489 is an equidigital number, since it uses as much as digits as its factorization.

161038489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 161038489 is about 12690.0941288865. The cubic root of 161038489 is about 544.0555299878.

The spelling of 161038489 in words is "one hundred sixty-one million, thirty-eight thousand, four hundred eighty-nine".