409798541 has 2 divisors, whose sum is σ = 409798542. Its totient is φ = 409798540.

The previous prime is 409798489. The next prime is 409798553. The reversal of 409798541 is 145897904.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 274564900 + 135233641 = 16570^2 + 11629^2 .

It is a cyclic number.

It is not a de Polignac number, because 409798541 - 2¹⁸ = 409536397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (409798591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204899270 + 204899271.

It is an arithmetic number, because the mean of its divisors is an integer number (204899271).

Almost surely, 2^409798541 is an apocalyptic number.

It is an amenable number.

409798541 is a deficient number, since it is larger than the sum of its proper divisors (1).

409798541 is an equidigital number, since it uses as much as digits as its factorization.

409798541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 409798541 is about 20243.4814446527. The cubic root of 409798541 is about 742.7741869238.

The spelling of 409798541 in words is "four hundred nine million, seven hundred ninety-eight thousand, five hundred forty-one".