474728909 has 2 divisors, whose sum is σ = 474728910. Its totient is φ = 474728908.

The previous prime is 474728887. The next prime is 474728911. The reversal of 474728909 is 909827474.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 289170025 + 185558884 = 17005^2 + 13622^2 .

It is a cyclic number.

It is not a de Polignac number, because 474728909 - 2¹⁶ = 474663373 is a prime.

Together with 474728911, 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 (474728929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 237364454 + 237364455.

It is an arithmetic number, because the mean of its divisors is an integer number (237364455).

Almost surely, 2^474728909 is an apocalyptic number.

It is an amenable number.

474728909 is a deficient number, since it is larger than the sum of its proper divisors (1).

474728909 is an equidigital number, since it uses as much as digits as its factorization.

474728909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1016064, while the sum is 50.

The square root of 474728909 is about 21788.2745760191. The cubic root of 474728909 is about 780.0969137745.

The spelling of 474728909 in words is "four hundred seventy-four million, seven hundred twenty-eight thousand, nine hundred nine".