478737511997 has 2 divisors, whose sum is σ = 478737511998. Its totient is φ = 478737511996.

The previous prime is 478737511981. The next prime is 478737512027. The reversal of 478737511997 is 799115737874.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 432360166681 + 46377345316 = 657541^2 + 215354^2 .

It is a cyclic number.

It is not a de Polignac number, because 478737511997 - 2⁴ = 478737511981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478737511937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239368755998 + 239368755999.

It is an arithmetic number, because the mean of its divisors is an integer number (239368755999).

Almost surely, 2^478737511997 is an apocalyptic number.

It is an amenable number.

478737511997 is a deficient number, since it is larger than the sum of its proper divisors (1).

478737511997 is an equidigital number, since it uses as much as digits as its factorization.

478737511997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93350880, while the sum is 68.

The spelling of 478737511997 in words is "four hundred seventy-eight billion, seven hundred thirty-seven million, five hundred eleven thousand, nine hundred ninety-seven".