169696969697 has 8 divisors (see below), whose sum is σ = 171285186600. Its totient is φ = 168109323264.

The previous prime is 169696969667. The next prime is 169696969753. The reversal of 169696969697 is 796969696961.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5172630241 + 164524339456 = 71921^2 + 405616^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 169696969697 - 2³⁰ = 168623227873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (169696969657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 467243 + ... + 746799.

It is an arithmetic number, because the mean of its divisors is an integer number (21410648325).

Almost surely, 2^169696969697 is an apocalyptic number.

It is an amenable number.

169696969697 is a deficient number, since it is larger than the sum of its proper divisors (1588216903).

169696969697 is a wasteful number, since it uses less digits than its factorization.

169696969697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285235.

The product of its digits is 3214155168, while the sum is 83.

The spelling of 169696969697 in words is "one hundred sixty-nine billion, six hundred ninety-six million, nine hundred sixty-nine thousand, six hundred ninety-seven".