478565497 has 2 divisors, whose sum is σ = 478565498. Its totient is φ = 478565496.

The previous prime is 478565471. The next prime is 478565519. The reversal of 478565497 is 794565874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 475937856 + 2627641 = 21816^2 + 1621^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-478565497 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (478560497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239282748 + 239282749.

It is an arithmetic number, because the mean of its divisors is an integer number (239282749).

Almost surely, 2^478565497 is an apocalyptic number.

It is an amenable number.

478565497 is a deficient number, since it is larger than the sum of its proper divisors (1).

478565497 is an equidigital number, since it uses as much as digits as its factorization.

478565497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8467200, while the sum is 55.

The square root of 478565497 is about 21876.1399017285. The cubic root of 478565497 is about 782.1927652984.

The spelling of 478565497 in words is "four hundred seventy-eight million, five hundred sixty-five thousand, four hundred ninety-seven".