478869329 has 2 divisors, whose sum is σ = 478869330. Its totient is φ = 478869328.

The previous prime is 478869283. The next prime is 478869341. The reversal of 478869329 is 923968874.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 425184400 + 53684929 = 20620^2 + 7327^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-478869329 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (478889329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239434664 + 239434665.

It is an arithmetic number, because the mean of its divisors is an integer number (239434665).

Almost surely, 2^478869329 is an apocalyptic number.

It is an amenable number.

478869329 is a deficient number, since it is larger than the sum of its proper divisors (1).

478869329 is an equidigital number, since it uses as much as digits as its factorization.

478869329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5225472, while the sum is 56.

The square root of 478869329 is about 21883.0831694256. The cubic root of 478869329 is about 782.3582633109.

The spelling of 478869329 in words is "four hundred seventy-eight million, eight hundred sixty-nine thousand, three hundred twenty-nine".