478083521 has 2 divisors, whose sum is σ = 478083522. Its totient is φ = 478083520.

The previous prime is 478083511. The next prime is 478083553. The reversal of 478083521 is 125380874.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 292033921 + 186049600 = 17089^2 + 13640^2 .

It is a cyclic number.

It is not a de Polignac number, because 478083521 - 2¹⁰ = 478082497 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (478083511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239041760 + 239041761.

It is an arithmetic number, because the mean of its divisors is an integer number (239041761).

Almost surely, 2^478083521 is an apocalyptic number.

It is an amenable number.

478083521 is a deficient number, since it is larger than the sum of its proper divisors (1).

478083521 is an equidigital number, since it uses as much as digits as its factorization.

478083521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 478083521 is about 21865.1211064563. The cubic root of 478083521 is about 781.9300880717.

The spelling of 478083521 in words is "four hundred seventy-eight million, eighty-three thousand, five hundred twenty-one".