161703589 has 2 divisors, whose sum is σ = 161703590. Its totient is φ = 161703588.

The previous prime is 161703557. The next prime is 161703613. The reversal of 161703589 is 985307161.

161703589 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161036100 + 667489 = 12690^2 + 817^2 .

It is a cyclic number.

It is not a de Polignac number, because 161703589 - 2⁵ = 161703557 is a prime.

It is a super-2 number, since 2×161703589² = 52296101390961842, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161703539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80851794 + 80851795.

It is an arithmetic number, because the mean of its divisors is an integer number (80851795).

Almost surely, 2^161703589 is an apocalyptic number.

It is an amenable number.

161703589 is a deficient number, since it is larger than the sum of its proper divisors (1).

161703589 is an equidigital number, since it uses as much as digits as its factorization.

161703589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 161703589 is about 12716.2726063890. The cubic root of 161703589 is about 544.8034967589.

The spelling of 161703589 in words is "one hundred sixty-one million, seven hundred three thousand, five hundred eighty-nine".