169641397 has 2 divisors, whose sum is σ = 169641398. Its totient is φ = 169641396.

The previous prime is 169641391. The next prime is 169641431. The reversal of 169641397 is 793146961.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88623396 + 81018001 = 9414^2 + 9001^2 .

It is a cyclic number.

It is not a de Polignac number, because 169641397 - 2³ = 169641389 is a prime.

It is a super-3 number, since 3×169641397³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (169641391) 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 as a sum of consecutive naturals, namely, 84820698 + 84820699.

It is an arithmetic number, because the mean of its divisors is an integer number (84820699).

Almost surely, 2^169641397 is an apocalyptic number.

It is an amenable number.

169641397 is a deficient number, since it is larger than the sum of its proper divisors (1).

169641397 is an equidigital number, since it uses as much as digits as its factorization.

169641397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 46.

The square root of 169641397 is about 13024.6457533401. The cubic root of 169641397 is about 553.5760341990.

The spelling of 169641397 in words is "one hundred sixty-nine million, six hundred forty-one thousand, three hundred ninety-seven".