409149745 has 8 divisors (see below), whose sum is σ = 496895616. Its totient is φ = 323375856.

The previous prime is 409149739. The next prime is 409149779. The reversal of 409149745 is 547941904.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 409149745 - 2¹⁵ = 409116977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 492537 + ... + 493366.

It is an arithmetic number, because the mean of its divisors is an integer number (62111952).

Almost surely, 2^409149745 is an apocalyptic number.

It is an amenable number.

409149745 is a deficient number, since it is larger than the sum of its proper divisors (87745871).

409149745 is an equidigital number, since it uses as much as digits as its factorization.

409149745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985991.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 409149745 is about 20227.4502842054. The cubic root of 409149745 is about 742.3819913955.

The spelling of 409149745 in words is "four hundred nine million, one hundred forty-nine thousand, seven hundred forty-five".