478778141 has 2 divisors, whose sum is σ = 478778142. Its totient is φ = 478778140.

The previous prime is 478778137. The next prime is 478778159. The reversal of 478778141 is 141877874.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 387499225 + 91278916 = 19685^2 + 9554^2 .

It is a cyclic number.

It is not a de Polignac number, because 478778141 - 2² = 478778137 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478708141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239389070 + 239389071.

It is an arithmetic number, because the mean of its divisors is an integer number (239389071).

Almost surely, 2^478778141 is an apocalyptic number.

It is an amenable number.

478778141 is a deficient number, since it is larger than the sum of its proper divisors (1).

478778141 is an equidigital number, since it uses as much as digits as its factorization.

478778141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 351232, while the sum is 47.

The square root of 478778141 is about 21880.9995429825. Note that the first 3 decimals coincide. The cubic root of 478778141 is about 782.3086003445.

It can be divided in two parts, 4787 and 78141, that added together give a palindrome (82928).

The spelling of 478778141 in words is "four hundred seventy-eight million, seven hundred seventy-eight thousand, one hundred forty-one".