169861441 has 8 divisors (see below), whose sum is σ = 171353000. Its totient is φ = 168376320.

The previous prime is 169861429. The next prime is 169861459. The reversal of 169861441 is 144168961.

It can be written as a sum of positive squares in 4 ways, for example, as 2547216 + 167314225 = 1596^2 + 12935^2 .

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 169861441 - 2⁷ = 169861313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 169861394 and 169861403.

It is not an unprimeable number, because it can be changed into a prime (169861421) 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 7 ways as a sum of consecutive naturals, for example, 61825 + ... + 64513.

It is an arithmetic number, because the mean of its divisors is an integer number (21419125).

Almost surely, 2^169861441 is an apocalyptic number.

It is an amenable number.

169861441 is a deficient number, since it is larger than the sum of its proper divisors (1491559).

169861441 is a wasteful number, since it uses less digits than its factorization.

169861441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3219.

The product of its digits is 41472, while the sum is 40.

The square root of 169861441 is about 13033.0902321744. The cubic root of 169861441 is about 553.8152809422.

The spelling of 169861441 in words is "one hundred sixty-nine million, eight hundred sixty-one thousand, four hundred forty-one".