461635409 has 2 divisors, whose sum is σ = 461635410. Its totient is φ = 461635408.

The previous prime is 461635403. The next prime is 461635417. The reversal of 461635409 is 904536164.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 243984400 + 217651009 = 15620^2 + 14753^2 .

It is a cyclic number.

It is not a de Polignac number, because 461635409 - 2²⁸ = 193199953 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (461635403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 230817704 + 230817705.

It is an arithmetic number, because the mean of its divisors is an integer number (230817705).

Almost surely, 2^461635409 is an apocalyptic number.

It is an amenable number.

461635409 is a deficient number, since it is larger than the sum of its proper divisors (1).

461635409 is an equidigital number, since it uses as much as digits as its factorization.

461635409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 461635409 is about 21485.7024320826. The cubic root of 461635409 is about 772.8579958684.

The spelling of 461635409 in words is "four hundred sixty-one million, six hundred thirty-five thousand, four hundred nine".