409975493 has 2 divisors, whose sum is σ = 409975494. Its totient is φ = 409975492.

The previous prime is 409975469. The next prime is 409975543. The reversal of 409975493 is 394579904.

It is an a-pointer prime, because the next prime (409975543) can be obtained adding 409975493 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 381694369 + 28281124 = 19537^2 + 5318^2 .

It is a cyclic number.

It is not a de Polignac number, because 409975493 - 2¹⁶ = 409909957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (409975453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204987746 + 204987747.

It is an arithmetic number, because the mean of its divisors is an integer number (204987747).

Almost surely, 2^409975493 is an apocalyptic number.

It is an amenable number.

409975493 is a deficient number, since it is larger than the sum of its proper divisors (1).

409975493 is an equidigital number, since it uses as much as digits as its factorization.

409975493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1224720, while the sum is 50.

The square root of 409975493 is about 20247.8515650426. The cubic root of 409975493 is about 742.8810821022.

The spelling of 409975493 in words is "four hundred nine million, nine hundred seventy-five thousand, four hundred ninety-three".