169944413 has 4 divisors (see below), whose sum is σ = 170825148. Its totient is φ = 169063680.

The previous prime is 169944403. The next prime is 169944419. The reversal of 169944413 is 314449961.

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 86806489 + 83137924 = 9317^2 + 9118^2 .

It is a cyclic number.

It is not a de Polignac number, because 169944413 - 2⁶ = 169944349 is a prime.

It is a super-2 number, since 2×169944413² = 57762207019829138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (169944419) 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, 440078 + ... + 440463.

It is an arithmetic number, because the mean of its divisors is an integer number (42706287).

Almost surely, 2^169944413 is an apocalyptic number.

It is an amenable number.

169944413 is a deficient number, since it is larger than the sum of its proper divisors (880735).

169944413 is an equidigital number, since it uses as much as digits as its factorization.

169944413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880734.

The product of its digits is 93312, while the sum is 41.

The square root of 169944413 is about 13036.2729719809. The cubic root of 169944413 is about 553.9054400769.

The spelling of 169944413 in words is "one hundred sixty-nine million, nine hundred forty-four thousand, four hundred thirteen".