461280509 has 2 divisors, whose sum is σ = 461280510. Its totient is φ = 461280508.

The previous prime is 461280497. The next prime is 461280511. The reversal of 461280509 is 905082164.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 366607609 + 94672900 = 19147^2 + 9730^2 .

It is a cyclic number.

It is not a de Polignac number, because 461280509 - 2¹⁶ = 461214973 is a prime.

Together with 461280511, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (461280559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 230640254 + 230640255.

It is an arithmetic number, because the mean of its divisors is an integer number (230640255).

Almost surely, 2^461280509 is an apocalyptic number.

It is an amenable number.

461280509 is a deficient number, since it is larger than the sum of its proper divisors (1).

461280509 is an equidigital number, since it uses as much as digits as its factorization.

461280509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 461280509 is about 21477.4418634995. The cubic root of 461280509 is about 772.6598903093.

The spelling of 461280509 in words is "four hundred sixty-one million, two hundred eighty thousand, five hundred nine".