207985663 has 2 divisors, whose sum is σ = 207985664. Its totient is φ = 207985662.

The previous prime is 207985643. The next prime is 207985681. The reversal of 207985663 is 366589702.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-207985663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (207985643) 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 as a sum of consecutive naturals, namely, 103992831 + 103992832.

It is an arithmetic number, because the mean of its divisors is an integer number (103992832).

Almost surely, 2^207985663 is an apocalyptic number.

207985663 is a deficient number, since it is larger than the sum of its proper divisors (1).

207985663 is an equidigital number, since it uses as much as digits as its factorization.

207985663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 46.

The square root of 207985663 is about 14421.7080472460. The cubic root of 207985663 is about 592.4856001295.

The spelling of 207985663 in words is "two hundred seven million, nine hundred eighty-five thousand, six hundred sixty-three".