206298640693 has 2 divisors, whose sum is σ = 206298640694. Its totient is φ = 206298640692.

The previous prime is 206298640651. The next prime is 206298640711. The reversal of 206298640693 is 396046892602.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141659646129 + 64638994564 = 376377^2 + 254242^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206298640693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206298640643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103149320346 + 103149320347.

It is an arithmetic number, because the mean of its divisors is an integer number (103149320347).

Almost surely, 2^206298640693 is an apocalyptic number.

It is an amenable number.

206298640693 is a deficient number, since it is larger than the sum of its proper divisors (1).

206298640693 is an equidigital number, since it uses as much as digits as its factorization.

206298640693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6718464, while the sum is 55.

The spelling of 206298640693 in words is "two hundred six billion, two hundred ninety-eight million, six hundred forty thousand, six hundred ninety-three".