409895641 has 4 divisors (see below), whose sum is σ = 414501300. Its totient is φ = 405289984.

The previous prime is 409895593. The next prime is 409895711. The reversal of 409895641 is 146598904.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 201526416 + 208369225 = 14196^2 + 14435^2 .

It is a cyclic number.

It is not a de Polignac number, because 409895641 - 2⁷ = 409895513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 409895591 and 409895600.

It is not an unprimeable number, because it can be changed into a prime (409893641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2302696 + ... + 2302873.

It is an arithmetic number, because the mean of its divisors is an integer number (103625325).

Almost surely, 2^409895641 is an apocalyptic number.

It is an amenable number.

409895641 is a deficient number, since it is larger than the sum of its proper divisors (4605659).

409895641 is an equidigital number, since it uses as much as digits as its factorization.

409895641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4605658.

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 409895641 is about 20245.8796054901. The cubic root of 409895641 is about 742.8328480062.

The spelling of 409895641 in words is "four hundred nine million, eight hundred ninety-five thousand, six hundred forty-one".