169409641 has 4 divisors (see below), whose sum is σ = 179374932. Its totient is φ = 159444352.

The previous prime is 169409549. The next prime is 169409683. The reversal of 169409641 is 146904961.

169409641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 146904961 = 7 ⋅20986423.

It can be written as a sum of positive squares in 2 ways, for example, as 54834025 + 114575616 = 7405^2 + 10704^2 .

It is a cyclic number.

It is not a de Polignac number, because 169409641 - 2²¹ = 167312489 is a prime.

It is a super-3 number, since 3×169409641³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 169409594 and 169409603.

It is not an unprimeable number, because it can be changed into a prime (169409941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4982620 + ... + 4982653.

It is an arithmetic number, because the mean of its divisors is an integer number (44843733).

Almost surely, 2^169409641 is an apocalyptic number.

It is an amenable number.

169409641 is a deficient number, since it is larger than the sum of its proper divisors (9965291).

169409641 is an equidigital number, since it uses as much as digits as its factorization.

169409641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9965290.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 169409641 is about 13015.7458871937. The cubic root of 169409641 is about 553.3238295734.

The spelling of 169409641 in words is "one hundred sixty-nine million, four hundred nine thousand, six hundred forty-one".