409474409 has 2 divisors, whose sum is σ = 409474410. Its totient is φ = 409474408.

The previous prime is 409474399. The next prime is 409474469. The reversal of 409474409 is 904474904.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 206554384 + 202920025 = 14372^2 + 14245^2 .

It is a cyclic number.

It is not a de Polignac number, because 409474409 - 2¹⁶ = 409408873 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (409474469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204737204 + 204737205.

It is an arithmetic number, because the mean of its divisors is an integer number (204737205).

Almost surely, 2^409474409 is an apocalyptic number.

It is an amenable number.

409474409 is a deficient number, since it is larger than the sum of its proper divisors (1).

409474409 is an equidigital number, since it uses as much as digits as its factorization.

409474409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 409474409 is about 20235.4740245935. The cubic root of 409474409 is about 742.5783017409.

The spelling of 409474409 in words is "four hundred nine million, four hundred seventy-four thousand, four hundred nine".