478770791 has 2 divisors, whose sum is σ = 478770792. Its totient is φ = 478770790.

The previous prime is 478770767. The next prime is 478770839. The reversal of 478770791 is 197077874.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-478770791 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478770091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239385395 + 239385396.

It is an arithmetic number, because the mean of its divisors is an integer number (239385396).

Almost surely, 2^478770791 is an apocalyptic number.

478770791 is a deficient number, since it is larger than the sum of its proper divisors (1).

478770791 is an equidigital number, since it uses as much as digits as its factorization.

478770791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 691488, while the sum is 50.

The square root of 478770791 is about 21880.8315884018. The cubic root of 478770791 is about 782.3045971002.

The spelling of 478770791 in words is "four hundred seventy-eight million, seven hundred seventy thousand, seven hundred ninety-one".