409169949 has 16 divisors (see below), whose sum is σ = 552299904. Its totient is φ = 269427200.

The previous prime is 409169933. The next prime is 409169951. The reversal of 409169949 is 949961904.

It is a cyclic number.

It is not a de Polignac number, because 409169949 - 2⁴ = 409169933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409169249) 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 15 ways as a sum of consecutive naturals, for example, 103489 + ... + 107369.

It is an arithmetic number, because the mean of its divisors is an integer number (34518744).

Almost surely, 2^409169949 is an apocalyptic number.

It is an amenable number.

409169949 is a deficient number, since it is larger than the sum of its proper divisors (143129955).

409169949 is a wasteful number, since it uses less digits than its factorization.

409169949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4308.

The product of its (nonzero) digits is 629856, while the sum is 51.

The square root of 409169949 is about 20227.9496983753. The cubic root of 409169949 is about 742.3942109142.

The spelling of 409169949 in words is "four hundred nine million, one hundred sixty-nine thousand, nine hundred forty-nine".