409481641 has 2 divisors, whose sum is σ = 409481642. Its totient is φ = 409481640.

The previous prime is 409481557. The next prime is 409481659. The reversal of 409481641 is 146184904.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 379275625 + 30206016 = 19475^2 + 5496^2 .

It is a cyclic number.

It is not a de Polignac number, because 409481641 - 2¹⁷ = 409350569 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 409481641.

It is not a weakly prime, because it can be changed into another prime (409481671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204740820 + 204740821.

It is an arithmetic number, because the mean of its divisors is an integer number (204740821).

Almost surely, 2^409481641 is an apocalyptic number.

It is an amenable number.

409481641 is a deficient number, since it is larger than the sum of its proper divisors (1).

409481641 is an equidigital number, since it uses as much as digits as its factorization.

409481641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 409481641 is about 20235.6527198902. The cubic root of 409481641 is about 742.5826734383.

The spelling of 409481641 in words is "four hundred nine million, four hundred eighty-one thousand, six hundred forty-one".