208400755207 has 2 divisors, whose sum is σ = 208400755208. Its totient is φ = 208400755206.

The previous prime is 208400755153. The next prime is 208400755247. The reversal of 208400755207 is 702557004802.

It is a happy number.

It is an a-pointer prime, because the next prime (208400755247) can be obtained adding 208400755207 to its sum of digits (40).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-208400755207 is a prime.

It is a super-2 number, since 2×208400755207² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 208400755207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208400755247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104200377603 + 104200377604.

It is an arithmetic number, because the mean of its divisors is an integer number (104200377604).

Almost surely, 2^208400755207 is an apocalyptic number.

208400755207 is a deficient number, since it is larger than the sum of its proper divisors (1).

208400755207 is an equidigital number, since it uses as much as digits as its factorization.

208400755207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 156800, while the sum is 40.

The spelling of 208400755207 in words is "two hundred eight billion, four hundred million, seven hundred fifty-five thousand, two hundred seven".