978736585313 has 2 divisors, whose sum is σ = 978736585314. Its totient is φ = 978736585312.

The previous prime is 978736585301. The next prime is 978736585339. The reversal of 978736585313 is 313585637879.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 768415287649 + 210321297664 = 876593^2 + 458608^2 .

It is a cyclic number.

It is not a de Polignac number, because 978736585313 - 2¹⁰ = 978736584289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 978736585313.

It is not a weakly prime, because it can be changed into another prime (978736585213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489368292656 + 489368292657.

It is an arithmetic number, because the mean of its divisors is an integer number (489368292657).

Almost surely, 2^978736585313 is an apocalyptic number.

It is an amenable number.

978736585313 is a deficient number, since it is larger than the sum of its proper divisors (1).

978736585313 is an equidigital number, since it uses as much as digits as its factorization.

978736585313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 114307200, while the sum is 65.

The spelling of 978736585313 in words is "nine hundred seventy-eight billion, seven hundred thirty-six million, five hundred eighty-five thousand, three hundred thirteen".