478238377 has 2 divisors, whose sum is σ = 478238378. Its totient is φ = 478238376.

The previous prime is 478238359. The next prime is 478238413. The reversal of 478238377 is 773832874.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 443144601 + 35093776 = 21051^2 + 5924^2 .

It is a cyclic number.

It is not a de Polignac number, because 478238377 - 2⁷ = 478238249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 478238377.

It is not a weakly prime, because it can be changed into another prime (478238317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239119188 + 239119189.

It is an arithmetic number, because the mean of its divisors is an integer number (239119189).

Almost surely, 2^478238377 is an apocalyptic number.

It is an amenable number.

478238377 is a deficient number, since it is larger than the sum of its proper divisors (1).

478238377 is an equidigital number, since it uses as much as digits as its factorization.

478238377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1580544, while the sum is 49.

The square root of 478238377 is about 21868.6619846757. The cubic root of 478238377 is about 782.0145039314.

The spelling of 478238377 in words is "four hundred seventy-eight million, two hundred thirty-eight thousand, three hundred seventy-seven".