478523819 has 2 divisors, whose sum is σ = 478523820. Its totient is φ = 478523818.

The previous prime is 478523789. The next prime is 478523861. The reversal of 478523819 is 918325874.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-478523819 is a prime.

It is a super-2 number, since 2×478523819² = 457970090700689522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (478573819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239261909 + 239261910.

It is an arithmetic number, because the mean of its divisors is an integer number (239261910).

Almost surely, 2^478523819 is an apocalyptic number.

478523819 is a deficient number, since it is larger than the sum of its proper divisors (1).

478523819 is an equidigital number, since it uses as much as digits as its factorization.

478523819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 47.

The square root of 478523819 is about 21875.1872906268. The cubic root of 478523819 is about 782.1700577299.

The spelling of 478523819 in words is "four hundred seventy-eight million, five hundred twenty-three thousand, eight hundred nineteen".