169996969 has 4 divisors (see below), whose sum is σ = 170460544. Its totient is φ = 169533396.

The previous prime is 169996951. The next prime is 169996973. The reversal of 169996969 is 969699961.

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: 969699961 = 881 ⋅1100681.

It is a cyclic number.

It is not a de Polignac number, because 169996969 - 2¹¹ = 169994921 is a prime.

It is a super-2 number, since 2×169996969² = 57797938938373922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 169996969.

It is not an unprimeable number, because it can be changed into a prime (169996919) 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 3 ways as a sum of consecutive naturals, for example, 231237 + ... + 231970.

It is an arithmetic number, because the mean of its divisors is an integer number (42615136).

Almost surely, 2^169996969 is an apocalyptic number.

It is an amenable number.

169996969 is a deficient number, since it is larger than the sum of its proper divisors (463575).

169996969 is an equidigital number, since it uses as much as digits as its factorization.

169996969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463574.

The product of its digits is 12754584, while the sum is 64.

The square root of 169996969 is about 13038.2885763431. The cubic root of 169996969 is about 553.9625333609.

The spelling of 169996969 in words is "one hundred sixty-nine million, nine hundred ninety-six thousand, nine hundred sixty-nine".