169229989 has 4 divisors (see below), whose sum is σ = 169286656. Its totient is φ = 169173324.

The previous prime is 169229923. The next prime is 169230013. The reversal of 169229989 is 989922961.

169229989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 989922961 = 163 ⋅6073147.

It is a cyclic number.

It is not a de Polignac number, because 169229989 - 2¹⁵ = 169197221 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 (169229089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23589 + ... + 29914.

It is an arithmetic number, because the mean of its divisors is an integer number (42321664).

Almost surely, 2^169229989 is an apocalyptic number.

It is an amenable number.

169229989 is a deficient number, since it is larger than the sum of its proper divisors (56667).

169229989 is an equidigital number, since it uses as much as digits as its factorization.

169229989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56666.

The product of its digits is 1259712, while the sum is 55.

The square root of 169229989 is about 13008.8427233171. The cubic root of 169229989 is about 553.1281679583.

The spelling of 169229989 in words is "one hundred sixty-nine million, two hundred twenty-nine thousand, nine hundred eighty-nine".