409849643 has 4 divisors (see below), whose sum is σ = 468399600. Its totient is φ = 351299688.

The previous prime is 409849639. The next prime is 409849679. The reversal of 409849643 is 346948904.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 409849643 - 2² = 409849639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (409849603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29274968 + ... + 29274981.

It is an arithmetic number, because the mean of its divisors is an integer number (117099900).

Almost surely, 2^409849643 is an apocalyptic number.

409849643 is a deficient number, since it is larger than the sum of its proper divisors (58549957).

409849643 is an equidigital number, since it uses as much as digits as its factorization.

409849643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58549956.

The product of its (nonzero) digits is 746496, while the sum is 47.

The square root of 409849643 is about 20244.7435893864. The cubic root of 409849643 is about 742.8050603613.

The spelling of 409849643 in words is "four hundred nine million, eight hundred forty-nine thousand, six hundred forty-three".