471212509 has 2 divisors, whose sum is σ = 471212510. Its totient is φ = 471212508.

The previous prime is 471212507. The next prime is 471212513. The reversal of 471212509 is 905212174.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 450373284 + 20839225 = 21222^2 + 4565^2 .

It is a cyclic number.

It is not a de Polignac number, because 471212509 - 2¹ = 471212507 is a prime.

Together with 471212507, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (471212507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 235606254 + 235606255.

It is an arithmetic number, because the mean of its divisors is an integer number (235606255).

Almost surely, 2^471212509 is an apocalyptic number.

It is an amenable number.

471212509 is a deficient number, since it is larger than the sum of its proper divisors (1).

471212509 is an equidigital number, since it uses as much as digits as its factorization.

471212509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 471212509 is about 21707.4298110117. The cubic root of 471212509 is about 778.1660337151.

The spelling of 471212509 in words is "four hundred seventy-one million, two hundred twelve thousand, five hundred nine".