208607874973697 has 16 divisors (see below), whose sum is σ = 232241268085200. Its totient is φ = 186458939197440.

The previous prime is 208607874973669. The next prime is 208607874973709. The reversal of 208607874973697 is 796379478706802.

It is a Cunningham number, because it is equal to 14443264²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 46196911642561 + 162410963331136 = 6796831^2 + 12744056^2 .

It is a cyclic number.

It is not a de Polignac number, because 208607874973697 - 2³² = 208603580006401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208607874973607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3468328172 + ... + 3468388317.

It is an arithmetic number, because the mean of its divisors is an integer number (14515079255325).

Almost surely, 2^{208607874973697} is an apocalyptic number.

It is an amenable number.

208607874973697 is a deficient number, since it is larger than the sum of its proper divisors (23633393111503).

208607874973697 is a wasteful number, since it uses less digits than its factorization.

208607874973697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6936716596.

The product of its (nonzero) digits is 10754021376, while the sum is 83.

The spelling of 208607874973697 in words is "two hundred eight trillion, six hundred seven billion, eight hundred seventy-four million, nine hundred seventy-three thousand, six hundred ninety-seven".