409244831 has 2 divisors, whose sum is σ = 409244832. Its totient is φ = 409244830.

The previous prime is 409244809. The next prime is 409244833. The reversal of 409244831 is 138442904.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 409244831 - 2¹⁴ = 409228447 is a prime.

It is a super-2 number, since 2×409244831² = 334962663400437122, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 409244833, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 409244791 and 409244800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (409244833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204622415 + 204622416.

It is an arithmetic number, because the mean of its divisors is an integer number (204622416).

Almost surely, 2^409244831 is an apocalyptic number.

409244831 is a deficient number, since it is larger than the sum of its proper divisors (1).

409244831 is an equidigital number, since it uses as much as digits as its factorization.

409244831 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 35.

The square root of 409244831 is about 20229.8005674797. The cubic root of 409244831 is about 742.4394965569.

The spelling of 409244831 in words is "four hundred nine million, two hundred forty-four thousand, eight hundred thirty-one".