169640589 has 4 divisors (see below), whose sum is σ = 226187456. Its totient is φ = 113093724.

The previous prime is 169640567. The next prime is 169640593. The reversal of 169640589 is 985046961.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 985046961 = 3 ⋅328348987.

It is not a de Polignac number, because 169640589 - 2⁵ = 169640557 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 (169640519) 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 in 3 ways as a sum of consecutive naturals, for example, 28273429 + ... + 28273434.

It is an arithmetic number, because the mean of its divisors is an integer number (56546864).

Almost surely, 2^169640589 is an apocalyptic number.

It is an amenable number.

169640589 is a deficient number, since it is larger than the sum of its proper divisors (56546867).

169640589 is an equidigital number, since it uses as much as digits as its factorization.

169640589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56546866.

The product of its (nonzero) digits is 466560, while the sum is 48.

The square root of 169640589 is about 13024.6147351851. The cubic root of 169640589 is about 553.5751553056.

The spelling of 169640589 in words is "one hundred sixty-nine million, six hundred forty thousand, five hundred eighty-nine".