478393739 has 2 divisors, whose sum is σ = 478393740. Its totient is φ = 478393738.

The previous prime is 478393733. The next prime is 478393793. The reversal of 478393739 is 937393874.

It is a happy number.

Together with next prime (478393793) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 478393739 - 2¹² = 478389643 is a prime.

It is not a weakly prime, because it can be changed into another prime (478393733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239196869 + 239196870.

It is an arithmetic number, because the mean of its divisors is an integer number (239196870).

Almost surely, 2^478393739 is an apocalyptic number.

478393739 is a deficient number, since it is larger than the sum of its proper divisors (1).

478393739 is an equidigital number, since it uses as much as digits as its factorization.

478393739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3429216, while the sum is 53.

The square root of 478393739 is about 21872.2138568550. The cubic root of 478393739 is about 782.0991773141.

The spelling of 478393739 in words is "four hundred seventy-eight million, three hundred ninety-three thousand, seven hundred thirty-nine".