169490069 has 12 divisors (see below), whose sum is σ = 197375724. Its totient is φ = 145119744.

The previous prime is 169490011. The next prime is 169490071. The reversal of 169490069 is 960094961.

It can be written as a sum of positive squares in 2 ways, for example, as 1787569 + 167702500 = 1337^2 + 12950^2 .

It is a de Polignac number, because none of the positive numbers 2^k-169490069 is a prime.

It is a super-2 number, since 2×169490069² = 57453766979249522, which contains 22 as substring.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (169490099) 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 11 ways as a sum of consecutive naturals, for example, 79157 + ... + 81269.

It is an arithmetic number, because the mean of its divisors is an integer number (16447977).

Almost surely, 2^169490069 is an apocalyptic number.

It is an amenable number.

169490069 is a deficient number, since it is larger than the sum of its proper divisors (27885655).

169490069 is a wasteful number, since it uses less digits than its factorization.

169490069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3764 (or 3757 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 169490069 is about 13018.8351629476. The cubic root of 169490069 is about 553.4113800574.

The spelling of 169490069 in words is "one hundred sixty-nine million, four hundred ninety thousand, sixty-nine".