473409509 has 2 divisors, whose sum is σ = 473409510.
Its totient is φ = 473409508.
The previous prime is 473409481. The next prime is 473409511. The reversal of 473409509 is 905904374.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 472192900 + 1216609 = 21730^2 + 1103^2
It is a cyclic number.
It is not a de Polignac number, because 473409509 - 216 = 473343973 is a prime.
Together with 473409511, 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 (473409809) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 236704754 + 236704755.
It is an arithmetic number, because the mean of its divisors is an integer number (236704755).
Almost surely, 2473409509 is an apocalyptic number.
It is an amenable number.
473409509 is a deficient number, since it is larger than the sum of its proper divisors (1).
473409509 is an equidigital number, since it uses as much as digits as its factorization.
473409509 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 136080, while the sum is 41.
The square root of 473409509 is about 21757.9757560302.
The cubic root of 473409509 is about 779.3735431279.
The spelling of 473409509 in words is "four hundred seventy-three million, four hundred nine thousand, five hundred nine".