208478193067 has 2 divisors, whose sum is σ = 208478193068. Its totient is φ = 208478193066.

The previous prime is 208478193047. The next prime is 208478193073. The reversal of 208478193067 is 760391874802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 208478193067 - 2⁷ = 208478192939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 208478192999 and 208478193017.

It is not a weakly prime, because it can be changed into another prime (208478193037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104239096533 + 104239096534.

It is an arithmetic number, because the mean of its divisors is an integer number (104239096534).

Almost surely, 2^208478193067 is an apocalyptic number.

208478193067 is a deficient number, since it is larger than the sum of its proper divisors (1).

208478193067 is an equidigital number, since it uses as much as digits as its factorization.

208478193067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4064256, while the sum is 55.

It can be divided in two parts, 208 and 478193067, that added together give a triangular number (478193275 = T₃₀₉₂₅).

The spelling of 208478193067 in words is "two hundred eight billion, four hundred seventy-eight million, one hundred ninety-three thousand, sixty-seven".