409975543 has 2 divisors, whose sum is σ = 409975544. Its totient is φ = 409975542.

The previous prime is 409975493. The next prime is 409975549. The reversal of 409975543 is 345579904.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-409975543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 409975493 and 409975502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (409975549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204987771 + 204987772.

It is an arithmetic number, because the mean of its divisors is an integer number (204987772).

Almost surely, 2^409975543 is an apocalyptic number.

409975543 is a deficient number, since it is larger than the sum of its proper divisors (1).

409975543 is an equidigital number, since it uses as much as digits as its factorization.

409975543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 680400, while the sum is 46.

The square root of 409975543 is about 20247.8527997415. The cubic root of 409975543 is about 742.8811123024.

The spelling of 409975543 in words is "four hundred nine million, nine hundred seventy-five thousand, five hundred forty-three".