478720252349 has 2 divisors, whose sum is σ = 478720252350. Its totient is φ = 478720252348.

The previous prime is 478720252313. The next prime is 478720252403. The reversal of 478720252349 is 943252027874.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 261778559449 + 216941692900 = 511643^2 + 465770^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-478720252349 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 478720252349.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478720251349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239360126174 + 239360126175.

It is an arithmetic number, because the mean of its divisors is an integer number (239360126175).

Almost surely, 2^478720252349 is an apocalyptic number.

It is an amenable number.

478720252349 is a deficient number, since it is larger than the sum of its proper divisors (1).

478720252349 is an equidigital number, since it uses as much as digits as its factorization.

478720252349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6773760, while the sum is 53.

The spelling of 478720252349 in words is "four hundred seventy-eight billion, seven hundred twenty million, two hundred fifty-two thousand, three hundred forty-nine".