478931773 has 2 divisors, whose sum is σ = 478931774. Its totient is φ = 478931772.

The previous prime is 478931771. The next prime is 478931779. The reversal of 478931773 is 377139874.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 414000409 + 64931364 = 20347^2 + 8058^2 .

It is a cyclic number.

It is not a de Polignac number, because 478931773 - 2¹ = 478931771 is a prime.

Together with 478931771, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478931771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239465886 + 239465887.

It is an arithmetic number, because the mean of its divisors is an integer number (239465887).

Almost surely, 2^478931773 is an apocalyptic number.

It is an amenable number.

478931773 is a deficient number, since it is larger than the sum of its proper divisors (1).

478931773 is an equidigital number, since it uses as much as digits as its factorization.

478931773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 889056, while the sum is 49.

The square root of 478931773 is about 21884.5098871325. The cubic root of 478931773 is about 782.3922680335.

The spelling of 478931773 in words is "four hundred seventy-eight million, nine hundred thirty-one thousand, seven hundred seventy-three".