409868249 has 16 divisors (see below), whose sum is σ = 498192768. Its totient is φ = 329171712.

The previous prime is 409868213. The next prime is 409868269. The reversal of 409868249 is 942868904.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 409868249 - 2⁸ = 409867993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 409868197 and 409868206.

It is not an unprimeable number, because it can be changed into a prime (409868269) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19427 + ... + 34599.

It is an arithmetic number, because the mean of its divisors is an integer number (31137048).

Almost surely, 2^409868249 is an apocalyptic number.

It is an amenable number.

409868249 is a deficient number, since it is larger than the sum of its proper divisors (88324519).

409868249 is a wasteful number, since it uses less digits than its factorization.

409868249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15424.

The product of its (nonzero) digits is 995328, while the sum is 50.

The square root of 409868249 is about 20245.2031108606. The cubic root of 409868249 is about 742.8163005986.

The spelling of 409868249 in words is "four hundred nine million, eight hundred sixty-eight thousand, two hundred forty-nine".