208388359253 has 2 divisors, whose sum is σ = 208388359254. Its totient is φ = 208388359252.

The previous prime is 208388359171. The next prime is 208388359343. The reversal of 208388359253 is 352953883802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150669738244 + 57718621009 = 388162^2 + 240247^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-208388359253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208388859253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104194179626 + 104194179627.

It is an arithmetic number, because the mean of its divisors is an integer number (104194179627).

Almost surely, 2^208388359253 is an apocalyptic number.

It is an amenable number.

208388359253 is a deficient number, since it is larger than the sum of its proper divisors (1).

208388359253 is an equidigital number, since it uses as much as digits as its factorization.

208388359253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12441600, while the sum is 56.

The spelling of 208388359253 in words is "two hundred eight billion, three hundred eighty-eight million, three hundred fifty-nine thousand, two hundred fifty-three".