382705409 has 2 divisors, whose sum is σ = 382705410. Its totient is φ = 382705408.

The previous prime is 382705403. The next prime is 382705451. The reversal of 382705409 is 904507283.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 380055025 + 2650384 = 19495^2 + 1628^2 .

It is a cyclic number.

It is not a de Polignac number, because 382705409 - 2²⁰ = 381656833 is a prime.

It is not a weakly prime, because it can be changed into another prime (382705403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 191352704 + 191352705.

It is an arithmetic number, because the mean of its divisors is an integer number (191352705).

Almost surely, 2^382705409 is an apocalyptic number.

It is an amenable number.

382705409 is a deficient number, since it is larger than the sum of its proper divisors (1).

382705409 is an equidigital number, since it uses as much as digits as its factorization.

382705409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 382705409 is about 19562.8578944898. The cubic root of 382705409 is about 726.0305022259.

The spelling of 382705409 in words is "three hundred eighty-two million, seven hundred five thousand, four hundred nine".