169005949 has 12 divisors (see below), whose sum is σ = 197745084. Its totient is φ = 144017664.

The previous prime is 169005943. The next prime is 169005961. The reversal of 169005949 is 949500961.

It can be written as a sum of positive squares in 2 ways, for example, as 95355225 + 73650724 = 9765^2 + 8582^2 .

It is not a de Polignac number, because 169005949 - 2⁷ = 169005821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (169005943) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1492 + ... + 18445.

It is an arithmetic number, because the mean of its divisors is an integer number (16478757).

Almost surely, 2^169005949 is an apocalyptic number.

It is an amenable number.

169005949 is a deficient number, since it is larger than the sum of its proper divisors (28739135).

169005949 is a wasteful number, since it uses less digits than its factorization.

169005949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20124 (or 20117 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 169005949 is about 13000.2288056788. The cubic root of 169005949 is about 552.8839686056.

The spelling of 169005949 in words is "one hundred sixty-nine million, five thousand, nine hundred forty-nine".