409994471 has 2 divisors, whose sum is σ = 409994472. Its totient is φ = 409994470.

The previous prime is 409994449. The next prime is 409994477. The reversal of 409994471 is 174499904.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-409994471 is a prime.

It is a super-3 number, since 3×409994471³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (409994477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204997235 + 204997236.

It is an arithmetic number, because the mean of its divisors is an integer number (204997236).

Almost surely, 2^409994471 is an apocalyptic number.

409994471 is a deficient number, since it is larger than the sum of its proper divisors (1).

409994471 is an equidigital number, since it uses as much as digits as its factorization.

409994471 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 409994471 is about 20248.3202019328. The cubic root of 409994471 is about 742.8925447220.

The spelling of 409994471 in words is "four hundred nine million, nine hundred ninety-four thousand, four hundred seventy-one".