409743449 has 2 divisors, whose sum is σ = 409743450. Its totient is φ = 409743448.

The previous prime is 409743443. The next prime is 409743457. The reversal of 409743449 is 944347904.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 409657600 + 85849 = 20240^2 + 293^2 .

It is a cyclic number.

It is not a de Polignac number, because 409743449 - 2²⁸ = 141307993 is a prime.

It is not a weakly prime, because it can be changed into another prime (409743443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204871724 + 204871725.

It is an arithmetic number, because the mean of its divisors is an integer number (204871725).

Almost surely, 2^409743449 is an apocalyptic number.

It is an amenable number.

409743449 is a deficient number, since it is larger than the sum of its proper divisors (1).

409743449 is an equidigital number, since it uses as much as digits as its factorization.

409743449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 44.

The square root of 409743449 is about 20242.1206645944. The cubic root of 409743449 is about 742.7409000399.

The spelling of 409743449 in words is "four hundred nine million, seven hundred forty-three thousand, four hundred forty-nine".