478794949 has 2 divisors, whose sum is σ = 478794950. Its totient is φ = 478794948.

The previous prime is 478794947. The next prime is 478794977. The reversal of 478794949 is 949497874.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 449016100 + 29778849 = 21190^2 + 5457^2 .

It is a cyclic number.

It is not a de Polignac number, because 478794949 - 2¹ = 478794947 is a prime.

Together with 478794947, 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 (478794947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239397474 + 239397475.

It is an arithmetic number, because the mean of its divisors is an integer number (239397475).

Almost surely, 2^478794949 is an apocalyptic number.

It is an amenable number.

478794949 is a deficient number, since it is larger than the sum of its proper divisors (1).

478794949 is an equidigital number, since it uses as much as digits as its factorization.

478794949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18289152, while the sum is 61.

The square root of 478794949 is about 21881.3836171299. The cubic root of 478794949 is about 782.3177548206.

The spelling of 478794949 in words is "four hundred seventy-eight million, seven hundred ninety-four thousand, nine hundred forty-nine".