169641449 has 2 divisors, whose sum is σ = 169641450. Its totient is φ = 169641448.

The previous prime is 169641431. The next prime is 169641467. The reversal of 169641449 is 944146961.

It is a balanced prime because it is at equal distance from previous prime (169641431) and next prime (169641467).

It can be written as a sum of positive squares in only one way, i.e., 149328400 + 20313049 = 12220^2 + 4507^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-169641449 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (169641469) 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 as a sum of consecutive naturals, namely, 84820724 + 84820725.

It is an arithmetic number, because the mean of its divisors is an integer number (84820725).

Almost surely, 2^169641449 is an apocalyptic number.

It is an amenable number.

169641449 is a deficient number, since it is larger than the sum of its proper divisors (1).

169641449 is an equidigital number, since it uses as much as digits as its factorization.

169641449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 44.

The square root of 169641449 is about 13024.6477495555. The cubic root of 169641449 is about 553.5760907614.

The spelling of 169641449 in words is "one hundred sixty-nine million, six hundred forty-one thousand, four hundred forty-nine".