409492849 has 2 divisors, whose sum is σ = 409492850. Its totient is φ = 409492848.

The previous prime is 409492777. The next prime is 409492879. The reversal of 409492849 is 948294904.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 333245025 + 76247824 = 18255^2 + 8732^2 .

It is a cyclic number.

It is not a de Polignac number, because 409492849 - 2²³ = 401104241 is a prime.

It is not a weakly prime, because it can be changed into another prime (409492879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204746424 + 204746425.

It is an arithmetic number, because the mean of its divisors is an integer number (204746425).

Almost surely, 2^409492849 is an apocalyptic number.

It is an amenable number.

409492849 is a deficient number, since it is larger than the sum of its proper divisors (1).

409492849 is an equidigital number, since it uses as much as digits as its factorization.

409492849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 746496, while the sum is 49.

The square root of 409492849 is about 20235.9296549479. The cubic root of 409492849 is about 742.5894485004.

The spelling of 409492849 in words is "four hundred nine million, four hundred ninety-two thousand, eight hundred forty-nine".