409939491 has 8 divisors (see below), whose sum is σ = 588631120. Its totient is φ = 252270432.

The previous prime is 409939489. The next prime is 409939529. The reversal of 409939491 is 194939904.

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

It is not a de Polignac number, because 409939491 - 2¹ = 409939489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 409939491.

It is not an unprimeable number, because it can be changed into a prime (409959491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5255596 + ... + 5255673.

It is an arithmetic number, because the mean of its divisors is an integer number (73578890).

Almost surely, 2^409939491 is an apocalyptic number.

409939491 is a deficient number, since it is larger than the sum of its proper divisors (178691629).

409939491 is a wasteful number, since it uses less digits than its factorization.

409939491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10511285.

The product of its (nonzero) digits is 314928, while the sum is 48.

The square root of 409939491 is about 20246.9625129302. The cubic root of 409939491 is about 742.8593360970.

The spelling of 409939491 in words is "four hundred nine million, nine hundred thirty-nine thousand, four hundred ninety-one".