169396641 has 6 divisors (see below), whose sum is σ = 244684050. Its totient is φ = 112931088.

The previous prime is 169396631. The next prime is 169396649. The reversal of 169396641 is 146693961.

It can be written as a sum of positive squares in only one way, i.e., 161188416 + 8208225 = 12696^2 + 2865^2 .

It is not a de Polignac number, because 169396641 - 2¹⁰ = 169395617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (169396649) 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 5 ways as a sum of consecutive naturals, for example, 9410916 + ... + 9410933.

It is an arithmetic number, because the mean of its divisors is an integer number (40780675).

Almost surely, 2^169396641 is an apocalyptic number.

It is an amenable number.

169396641 is a deficient number, since it is larger than the sum of its proper divisors (75287409).

169396641 is a wasteful number, since it uses less digits than its factorization.

169396641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18821855 (or 18821852 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 169396641 is about 13015.2464824912. The cubic root of 169396641 is about 553.3096757276.

The spelling of 169396641 in words is "one hundred sixty-nine million, three hundred ninety-six thousand, six hundred forty-one".