478747121 has 2 divisors, whose sum is σ = 478747122. Its totient is φ = 478747120.

The previous prime is 478747091. The next prime is 478747141. The reversal of 478747121 is 121747874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 432016225 + 46730896 = 20785^2 + 6836^2 .

It is a cyclic number.

It is not a de Polignac number, because 478747121 - 2²² = 474552817 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (478747141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239373560 + 239373561.

It is an arithmetic number, because the mean of its divisors is an integer number (239373561).

Almost surely, 2^478747121 is an apocalyptic number.

It is an amenable number.

478747121 is a deficient number, since it is larger than the sum of its proper divisors (1).

478747121 is an equidigital number, since it uses as much as digits as its factorization.

478747121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 87808, while the sum is 41.

The square root of 478747121 is about 21880.2906973376. The cubic root of 478747121 is about 782.2917047410.

The spelling of 478747121 in words is "four hundred seventy-eight million, seven hundred forty-seven thousand, one hundred twenty-one".