169906441 has 4 divisors (see below), whose sum is σ = 171146772. Its totient is φ = 168666112.

The previous prime is 169906433. The next prime is 169906463. The reversal of 169906441 is 144609961.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 107433225 + 62473216 = 10365^2 + 7904^2 .

It is a cyclic number.

It is not a de Polignac number, because 169906441 - 2³ = 169906433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 169906394 and 169906403.

It is not an unprimeable number, because it can be changed into a prime (169906421) 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, 619960 + ... + 620233.

It is an arithmetic number, because the mean of its divisors is an integer number (42786693).

Almost surely, 2^169906441 is an apocalyptic number.

It is an amenable number.

169906441 is a deficient number, since it is larger than the sum of its proper divisors (1240331).

169906441 is a wasteful number, since it uses less digits than its factorization.

169906441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240330.

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

The square root of 169906441 is about 13034.8164927628. The cubic root of 169906441 is about 553.8641825392.

The spelling of 169906441 in words is "one hundred sixty-nine million, nine hundred six thousand, four hundred forty-one".